The management of Nixon Corporation is investigating purchasing equipment that would cost $$538,000$ and have a $7$ year life with no salvage value. The equipment would allow an expansion of capacity that would increase sales revenues by $$374,000$ per year and cash operating expenses by $$216,000$ per year. $($Ignore income taxes.$)$

Required:

Determine the simple rate of return on the investment. $($Round your answer to $1$ decimal place.$)$ I got $29\mathrm{.}36$ so rounded should be $29\mathrm{.}4$ but it keeps telling me I$\text{'}$m wrong