Cant figure out this hw question... plesse explain how you got answer thank you so much!!

An investor wants to triple her money in 6 years. Required: What annual rate of interest must she earn on her investment to accomplish her investment goal? (Round your answer as directed, but do not use rounded numbers in intermediate calculations. Enter your answer as a percent rounded to 2 decimal places (e.g., 32.16).) Annual rate 1%