Kenneth Clark bought 10-year, 10.20 percent coupon bonds issued by the U.S. Treasury three years ago at $900.69. If he sells these $1,000 face value bonds, at the current price of $828.68, what is his realized yield on the bonds? Assume similar coupon-paying bonds make annual coupon payments. (Round intermediate calculations to 5 decimal places, e.g. 1.25145 and final answer to 2 decimal places, eg. 15.25%) Realised rate of return 9 %