<?xml version="1.0" encoding="us-ascii"?><InstanceReport xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><Version>2.4.0.8</Version><ReportLongName>300900 - Disclosure - Earnings per share ("EPS") (Tables)</ReportLongName><DisplayLabelColumn>true</DisplayLabelColumn><ShowElementNames>false</ShowElementNames><RoundingOption /><HasEmbeddedReports>false</HasEmbeddedReports><Columns><Column FlagID="0"><Id>1</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

</LabelSeparator><CurrencyCode /><FootnoteIndexer /><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName /><CurrencySymbol /><contextRef><ContextID>Q2_2013_Dur</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001401112</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2013-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2013-06-30T00:00:00</PeriodEndDate><Segments /><Scenarios /></contextRef><UPS /><CurrencyCode /><OriginalCurrencyCode /></MCU><CurrencySymbol /><Labels><Label Key="CalendarSupplement" Id="0" Label="6 Months Ended" /><Label Key="Calendar" Id="1" Label="Jun. 30, 2013" /></Labels></Column></Columns><Rows><Row FlagID="0"><Id>1</Id><IsAbstractGroupTitle>true</IsAbstractGroupTitle><LabelSeparator>

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</LabelSeparator><Level>2</Level><ElementName>us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock</ElementName><ElementPrefix>us-gaap_</ElementPrefix><IsBaseElement>true</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsCalendarTitle>false</IsCalendarTitle><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><PreferredLabelRole>terseLabel</PreferredLabelRole><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="Q2_2013_Dur" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText>&lt;div&gt;&lt;table cellspacing="0" style="vertical-align:top;font-family:Georgia;;width:100%;border-collapse:collapse;margin-left:0pt;"&gt;&lt;tr style=""&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:317.25pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;"&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td colspan="2" style="vertical-align:top;font-family:Georgia;;width:192.5pt;border-bottom:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:center;"&gt;&lt;b&gt;Six Months Ended June 30,&lt;!--Exclude empty div--&gt;&lt;/b&gt;&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style=""&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:317.25pt;border-bottom:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;"&gt;&lt;b&gt;Numerators&lt;!--Exclude empty div--&gt;&lt;/b&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;border-top:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;border-top:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:center;"&gt;&lt;b&gt;2012&lt;!--Exclude empty div--&gt;&lt;/b&gt;&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;border-top:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;border-top:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:center;"&gt;&lt;b&gt;2013&lt;!--Exclude empty div--&gt;&lt;/b&gt;&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style=""&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:317.25pt;border-top:solid windowtext 1.5pt;border-top:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;"&gt;Net income / (loss)&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;border-top:solid windowtext 1.5pt;border-top:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;$899,191&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;border-top:solid windowtext 1.5pt;border-top:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;$(3,494,070)&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style=""&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:317.25pt;vertical-align:middle;border-bottom:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;"&gt;Less: Net (income) / loss attributable to non-vested share awards&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;vertical-align:bottom;border-bottom:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;(27,295)&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;vertical-align:bottom;border-bottom:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;66,236&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style=""&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:317.25pt;vertical-align:middle;border-top:solid windowtext 1.5pt;border-top:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;"&gt;&lt;b&gt;Net income / (loss) attributable to common shareholders&lt;!--Exclude empty div--&gt;&lt;/b&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;vertical-align:middle;border-top:solid windowtext 1.5pt;border-top:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;&lt;b&gt;$871,896&lt;!--Exclude empty div--&gt;&lt;/b&gt;&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;vertical-align:middle;border-top:solid windowtext 1.5pt;border-top:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;&lt;b&gt;$(3,427,834)&lt;!--Exclude empty div--&gt;&lt;/b&gt;&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style=""&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:317.25pt;vertical-align:middle;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;"&gt;&amp;#160;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;vertical-align:middle;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;&lt;!--Exclude empty div--&gt;&amp;#160;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;vertical-align:middle;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;&lt;!--Exclude empty div--&gt;&amp;#160;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style=""&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:317.25pt;vertical-align:middle;border-bottom:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;"&gt;&lt;b&gt;Denominators&lt;!--Exclude empty div--&gt;&lt;/b&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;vertical-align:middle;border-bottom:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;&lt;!--Exclude empty div--&gt;&amp;#160;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;vertical-align:middle;border-bottom:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;&lt;!--Exclude empty div--&gt;&amp;#160;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style=""&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:317.25pt;border-top:solid windowtext 1.5pt;border-top:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;"&gt;&lt;b&gt;Weighted average common shares outstanding, basic and diluted&lt;!--Exclude empty div--&gt;&lt;/b&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;vertical-align:bottom;border-top:solid windowtext 1.5pt;border-top:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;&lt;b&gt;5,913,195&lt;!--Exclude empty div--&gt;&lt;/b&gt;&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;vertical-align:bottom;border-top:solid windowtext 1.5pt;border-top:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;&lt;b&gt;11,016,733&lt;!--Exclude empty div--&gt;&lt;/b&gt;&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style=""&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:317.25pt;border-bottom:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;"&gt;&amp;#160;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;border-bottom:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;&lt;!--Exclude empty div--&gt;&amp;#160;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;border-bottom:solid windowtext 1.5pt;border-bottom:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;&lt;!--Exclude empty div--&gt;&amp;#160;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style=""&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:317.25pt;border-top:solid windowtext 1.5pt;border-top:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;"&gt;&lt;b&gt;Net income / (loss) per common share, basic and diluted:&lt;!--Exclude empty div--&gt;&lt;/b&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;border-top:solid windowtext 1.5pt;border-top:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;&lt;b&gt;$0.15&lt;!--Exclude empty div--&gt;&lt;/b&gt;&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;font-family:Georgia;;width:96.25pt;border-top:solid windowtext 1.5pt;border-top:solid windowtext 1.5pt;padding:0pt 5.4pt 0pt 5.4pt;"&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;line-height:10pt;text-align:right;"&gt;&lt;b&gt;($0.31)&lt;!--Exclude empty div--&gt;&lt;/b&gt;&lt;!--Exclude empty div--&gt;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td style="margin:0;padding:0;border:none;width:266.6pt;" /&gt;&lt;td style="margin:0;padding:0;border:none;width:86.9pt;" /&gt;&lt;td style="margin:0;padding:0;border:none;width:89.3pt;" /&gt;&lt;/tr&gt;&lt;/table&gt;&lt;p style="margin-left:0pt;margin-right:0pt;margin-top:0pt;margin-bottom:.0001pt;font-size:10.0pt;font-family:&amp;quot;Times New Roman&amp;quot;;"&gt;&amp;#160;&lt;!--Exclude empty p--&gt;&lt;/p&gt;&lt;/div&gt;</NonNumbericText><FootnoteIndexer /><CurrencyCode 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