Calculating Returns. You purchased a zero-coupon bond one year ago for $278.83. The market interest rate is now 8 percent. Required: If the bond had 17 years to maturity when you originally purchased it, what was your total return for the past year? (Do not round intermediate calculations. Enter your answer as a percentage rounded to 2 decimal places (e.g., 32.16).) Total return for the past year %