You have $2,100 that you want to invest in your classmate's start-up business. You believe the business idea to be great and expect to get $4,800 back at the end of three years. If all goes according to plan, what will the annual return on your investment be? (Round intermediate calculations to 4 decimal places, e.g. 2.5125 and final answer to 2 decimal places, e.g. 15.25.) Expected rate of return %