A bond is issued with a coupon of 6% paid annually, a maturity of 38 years, and a yleid to maturity of 9%. What rate of return will be eamed by an investor who purchases the bond for $679.28 and holds it for 1 year if the bond's yield to maturity at the end of the year is 12%? Note: Do not round intermediate calculations, Enter your answer as a percent rounded to 2 decimal places. Negative amount should be indicated by a minus sign