ABC Inc. has a bond outstanding with 15 years to maturity, an 8.25% nominal coupon, semiannual payments, and a $1,000 par value. The bond has a 6.50% nominal yield to maturity, but it can be called in 6 years at a price of $1,120. What is the bond's nominal yield to call? Answer just the number without the % sign. Round to two decimal places.