A 7-year zero-coupon bond has a face value of $1,000. If its YTM changes from 3.6% to 5.0%, what is the resulting percentage change in its price? Use the price determined from the first yield, 3.6%, as the base in the percentage calculation. Round to the nearest tenth of a percent. (e.g. 4.321%=4.3 ). [Hint: Percent price change =((P2P1)/P1)100. If the price dropped, answer should be negative.]