I know the answer is not 39% or 38.95%

Holding period and annual (investment) returns. Bohenick Classic Automobiles restores and rebuilds old classic cars. The company purchased and restored a classic 1957 Thunderbird convertible 7 years ago for $7,500.00. Today at auction, the car sold for $75,000.00. What are the holding period return and the annual return on this investment? What is the holding period return of the car? 900 % (Round to two decimal places.) What is the simple annual return on the car? 39 % (Round to two decimal places.)