You've collected the following information from your favorite financial website. According to your research, the growth rate in dividends for Manta Energy for the previous 10 years has been negative 13 percent. If investors feel this growth rate will continue, what is the required return for the stock? Note: A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16