I need help with this question and specifically how to calculate.

Cappuccino, Inc. Four-Year Selected Financial Data Years Ended January 31, 2017-2014 2017 2016 13,841 $ 13,675 $ 9,700 8,600 70 1,454 98 261 (13) 875 - 76 73 2014 9,057 5,314 104 Operating Results: Net Sales Cost of Goods Sold Interest Expense Income from Operations Income Tax Expense Net Income (Net Loss) Cash Dividends 49 2015 11,631 $ 6,771 48 1,815 333 1,121 75 1,334 241 821 74 Financial Position: 1,682 7,594 1.42:1 Merchandise Inventory Total Assets Current Ratio Stockholders' Equity Average Number of Shares of Common Stock Outstanding 1,900 7,011 0.90:1 2,922 1,470 5,187 1.28:1 2,626 1,048 3,969 1.14:1 1,590 3,004 852 886 894 578 Requirement 5. Compute and evaluate Cappuccino's rate of return on common stockholders' equity (ROE) for 2017-2015. (Round the ROE ratio to the nearest tenth percent. X.X% (NI - Preferred dividends) 1 Avg. common stockholders' equity ROE 2017 (13) 2016 875 2015 1,121 EA EA