please answer carefully other wise I will give downvote

Although appealing to more refined tastes, art as a collectible has not always performed so profitably. In 2010, an auction house sold a painting at auction for a price of $1,200,000. Unfortunately for the previous owner, he had purchased it three years earlier at a price of $1780,000. What was his annual rate of return on this painting? (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, eg.. 32.16.) 1%