Can you help me solve this general accounting problem with the correct methodology?

Northern Ridge Inc. reported a net income of $520,000 for the year 2023. Its common stockholders' equity was $800,000 at January 1, 2023, and $1,000,000 at December 31, 2023. Northern Ridge has 10,000 outstanding shares of 6%, $50 par value cumulative preferred stock. In December 2023, the board of directors declared both the annual preferred dividend and a $90,000 common stock dividend. Calculate Northern Ridge Inc.'s 2023 return on common stockholders' equity (ROE)