Mc corporation reports the following non-gaap information in its 2016 form 10-k. use this information to answer the requirements. year ended december 31 ($ in millions) 2016 2015 net income attributable to fmc stockholders (gaap) $227.4 $507.3 corporate special charges (income), pre-tax 159.7 573.5 income tax expense (benefit) on corporate special charges (income) (48.5) (144.9) corporate special charges (income), net of income taxes 111.2 428.6 discontinued operations attributable to fmc stockholders, net of income taxes 33.7 (676.4) non-gaap tax adjustments 29.7 95.3 adjustments after tax earnings from continuing operations attributable to fmc stockholders (non-gaap) $402.0 $354.8 we believe that this measure provides useful information about our operating results to investors. we also believe that excluding the effect of restructuring and other income and charges, non-operating pension and postretirement charges, certain non-gaap tax adjustments from operating results and discontinued operations allows management and investors to compare more easily the financial performance of our underlying businesses from period to period. compute the return on equity for each year. average equity was $1,911.7 million and $1,698.1 million for 2016 and 2015, respectively. round answers to one decimal place (ex: 0.2345 = 23.5%)