SUPERVALU, one of the largest grocery retailers in the United States, is headquartered in Minneapolis. Suppose the following financial information (in millions) was taken from the company's 2017 annual report: net sales $43,400, net income $370, beginning stockholders' equity $2,540, and ending stockholders' equity $2,835. There were no dividends paid on preferred stock.

Compute the return on common stockholders' equity.(Round answer to 2 decimal places, e.g. 12.56%.)

The return on common stockholders' equity ratio

%