Josh Kavern bought 10-year, 11.5 percent coupon bonds issued by the U.S. Treasury three years ago at $912.38. If he sells these bonds, for which he paid the face value of $1,000, at the current price of $840.18, what is his realized yield on the bonds? Assume similar coupon paying bonds make annual coupon payments.(Round intermediate calculations to 5 decimal places, eg 1.25413. Round final answer to 2 decimal places)