You're trying to determine whether to expand your business by building a new manufacturing plant. The plant has an installation cost of $13.5 million, which will be depreciated straight-line to zero over its four-year life. If the plant has projected net income of $1,570,000, $1,684,200, $1,716,300, and $1,097,400 over these four years, respectively, what is the project's average accounting return (AAR)? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Average accounting return %