What is the yield to call of a 30-year to maturity bond that pays a coupon rate of 11.52 percent per year, has a $1,000 par value, and is currently priced at $953? The bond can be called back in 5 years at a call price $1, 066. Assume annual coupon payments. Round the answer to two decimal places in percentage form. (Write the percentage sign in the "units " box)