Baird Painting Company is considering whether to purchase a new spray paint machine that costs $$2,000.$ The machine is expected to save labor, increasing net income by $$300$ per year. The effective life of the machine is $15$ years according to the manufacturer's estimate.

Required

a$.$ Determine the unadjusted rate of return based on the average cost of the investment.

Note: Enter your answer as a whole percentage $($e$.$g$..55$ should be entered as $55).$

Unadjusted rate of return