McDuck Inc.'s bonds currently sell for $1,275. They pay a $90 annual coupon, have a 25-year maturity, and a $1.000 par value, but they can be called in 6 years at $1,150. Compute the Yield to Call (State as a percent, but do not include the percent sign and round to the second decimal place. Thus, 98765% would be written as 9.88 to be correct)