Although appealing to more refined tastes, art as a collectible has not always performed so profitably. during 2010, deutscher-menzies sold arkie under the shower, a painting by renowned australian painter brett whiteley, at auction for a price of $1,100,000. unfortunately for the previous owner, he had purchased it 3 years earlier at a price of $1,680,000. 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, e. g., 32.16.)