pls explain to me step by step

Problem 7-14 Constant-Growth Model (LO2) Arts and Crafts, Inc. will pay a dividend of $9 per share in 1 year. It sells at $90 a share, and firms in the same industry provide an expected rate of return of 15%. What must be the expected growth rate of the company's dividends? (Do not round intermediate calculations. Enter your answer as a whole percent.) Expected growth rate %