Josh Kavern bought 10-year, 12.26 percent coupon bonds issued by the U.S. Treasury three years ago at $913.44. If he sells these bonds, for which he paid the face value of $1,000, at the current price of $750.00, what is his realized yield on the bonds? Assume similar coupon paying bonds make annual coupon payments. (Round answer to 2 decimal places, e.g. 15.25%.)