I need help figuring out the EFN PERCENTAGE. CANNOT SEEM TO GET IT CORRECT.

calculations and round your answers to the nearest whole number, e.g., 32.) The most recent financial statements for Crosby, Incorporated, follow. Interest expense will remain constant; the tax rate and the dividend payout rate will also remain constant. Costs, other expenses, current assets, fixed assets, and accounts payable increase spontaneously with sales. Assume the firm is operating at full capacity and the debtequity ratio is held constant. Calculate the EFN for 15, 20 and 45 percent growth rates. (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answers to the nearest whole number, e.g., 32.)