Peach Co. is considering purchasing a new tractor to harvest their premium catnip. The new tractor would cost $646,100 and have a useful life of 14 years and no salvage value. The tractor would allow more catnip to be harvested and increase sales revenue by $276,000 per year and operating expenses by $170,150 per year, including depreciation expense from the tractor. What is the accounting rate of return?

Round your answer to 2 d.p. as a percent. For example, if you believe the answer is 10.71%, enter 10.71