What is the percentage change in price for a zero coupon bond if the yield falls by $1\%$ from $5\mathrm{.}5\%$ to $4\mathrm{.}5\%?$ The bond has a face value of $$1,000$ and it matures in $7$ years. $(P_{\text{a}\text{f}\text{t}\text{e}\text{r}}-P_{\text{b}\text{e}\text{f}\text{o}\text{r}\text{e}})$

Express your answer in percentage form rounded to one decimal place.