Suppose the following financial information is available for Walgreen Company. 2017 2016 $12,930.0 $11,630.0 (in millions) Average common stockholders' equity Dividends declared for common stockholders Dividends declared for preferred stockholders Net income 515 360 0 0 1,865 2,165 Calculate the payout ratio and return on common stockholders' equity for 2017 and 2016. (Round answers to 1 decimal place, e.g. 12.5%.) 2017 2016 Payout ratio % % Return on common stockholders' equity % %