Although appealing to more refined tastes, art as a collectible has not always performed so profitably. During 2010, Deutscher-M sold Arkies under the Shower, a painting by renowned Australian painter Brett Whiteley, at auction for a price of $1,070,000. Unfortunately for the previous owner, he had purchased it three years earlier at a price of $1,650,000. What was his annual rate of return on this painting? (Do not round intermediate calculations. Round the final answer to 2 decim places. Negative amounts should be indicated by a minus sign.) Annual rate of return 17.71%