help!! the answer is supposed to be 19.1% but I can't figure out how to get that

15) The management of Ro Corporation is investigating automating a process. Old equipment, with a current salvage value of $30.000. would be replaced by a new machine. The new machine would be purchased for $438.000 and would have a 6 year useful life and no salvage value. By automating the process, the company would save $151,000 per year in cash operating costs. The simple rate of return on the investment is closest to (Ignore income taxes.)