Profitability Analysis for Arriba Corp. For the year ended September 26, 2015, Arriba Corporation reported net income of $2,900 million. Total shareholders' equity on this date was $18,458 million, and on September 27, 2014, it was $19,533 million. No preferred stock was outstanding in either year. Required: 1. Compute Arriba's return on common stockholders' equity for the year ended September 26, 2015. Round your answer to two decimal places.