Consider a 9% coupon bond with 2 years to maturity and a face value of $100. Assume the bond is trading at a yield of 8%. Approximate the percentage change in price using duration if yield goes down by 71 basis points. Coupons are paid semi-annually. Assume semi- annual compounding. Express your answer in basis points, and round to two decimal places. If your answer is a price decline, then include the negative sign in your