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 2022 annual report: net sales $41,800, net income $397, beginning common stockholders' equity $2,612, and ending common stockholders' equity $2,918. Compute the return on common stockholders' equity. (Round answer to 1 decimal place, e.g. 10.5\%.) Return on common stockholders' equity %