You purchased a zero-coupon bond one year ago for $281.33. The market interest rate is now 7 percent. Required: If the bond had 19 years to maturity when you originally purchased it, what was your total return for the past year? (Do not include the percent sign (%). Round your answer to 2 decimal places (e.g., 32.16).) Total return for the past year= ? % I'm getting 5.16 or 5.17% but it keeps saying incorrect