How do you calculate ROE and What is the ROE of Papa John's Pizza in 2017?

Papa John's International, Inc. and Subsidiaries Consolidated Statements of Income December 31 2017 Year ended ember 2016 December 27, 2015 In thousands, except per share amounts Revenues: Domestic Company-owned restaurant sales North America franchise royalties and fees North America commissary and other sales International S 816,718 815,931 756,307 96,056 680,321 104,691 1,637,375 106,729 733,627 126.285 1,783,359 102,980 681,606 113.103 1,713,620 Total revenues Costs and expenses: Operating costs (excluding depreciation and amortization shown separately Domestic Company-owned restaurant expenses 664,640 685,206 651,536 631,475 71,509 163,812 40,987 1,559,319 604,206 629,423 63,506 163,626 40,307 1,501,068 North America commissary and other expenses International expenses 158,183 43,668 1,630,668 General and administrative expenses Depreciation and amortization Total costs and expenses Refranchising and impairment gains/(losses), net Operating income Legal settlement Investment income Interest expense Income before income taxes Income tax expense Net income before attribution to noncontrolling interests Income attributable to noncontrolling interests Net income attributable to the Company 151,017 608 140,342 106,525 164,523 898 785 136,307 (12,278) 5,676 119,147 158,809 49,717 109,092 6,282 75,682 $ 102,292 102,820S Calculation of income for earnings per share: Net income attributable to the Company Change in noncontrolling interest redemption value Net income attributable to participating securities Net income attributable to common shareholders S 102,292 S 102,820S 75,682 423 420 103,288 S 102,967 S 2.76 S Basic earnings per common share Diluted earnings per common share Basic weighted average common shares outstanding Diluted weighted average common shares outstanding 36,083 36.522 39,458 40,000 37,608 Dividends declared per common share See accompanying notes