A bond has a Macaulay duration of 10.00 and is priced to yield 8.0%. If interest rates go up so that the yield goes to 8.5%, what will be the percentage change in the price of the bond? Now, if the yield on this bond goes down to 7.5%, what will be the bond's percentage change in price? Comment on your findings. If interest rates go up to 8.5%, the percentage change in the price of the bond is \%. (Round to two decimal places.)