Magna International Inc. is a leading global supplier of technologically advanced automotive components, systems, and modules. Selected financial information (in US$ millions) follows:

2017 2016 2015 Sales $38,946 $36,445 $32,134 Cost of goods sold 33,258 31,123 27,559 Profit 2,206 2,031 2,013 Current assets 11,220 10,163 11,144 Current liabilities 9,169 8,695 7,276

(a) Calculate the gross profit margin, profit margin, and current ratio for each year. (Round Gross profit margin to 1 decimal place, e.g. 52.7% and all other answers to 2 decimal places, e.g. 52.75 or 52.75%.)

2017 2016 2015 Gross profit margin % % % Profit margin % % % Current ratio : 1 : 1 : 1