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 2020 annual report: net sales $41,810, net income $407, beginning common stockholders' equity $2,615, and ending common stockholders' equity $2,894. Compute the return on common stockholders' equity. (Round answer to 1 decimal place, e.g. 10.5%) Return on common stockholders' equity