The net income of a company for the year was $ 550 comma 000 . The company has no preferred stock. Common​ stockholders' equity was $ 1 comma 900 comma 000 at the beginning of the year and $ 2 comma 300 comma 000 at the end of the year. Calculate the rate of return on common​ stockholders' equity.​ (Round your answer to two decimal​ places.)