(Bonds) A bond with a $1,000 par, 6 years to maturity, a coupon rate of 6%, and annual payments has a yield to maturity of 3.6%. What will be the percentage change in the bond price if the yield changes instantaneously to 4.7%? (If your answer is, e.g., -1.123%, enter it as -1.123. If the sign of the price change is incorrect, no credit will be given.)