What is the realized yield on a bond with an annual coupon of $7\mathrm{.}57\%$ that is paid semiannually, a par value of $$1,000,30$ years to maturity, that was purchased for $$888\mathrm{.}42$ but has increased$/$decreased to $$964\mathrm{.}73$ over a $5-$year holding period?

$[$Enter the answer in as a percent $($e$.$g$.,5\mathrm{.}55\%=5\mathrm{.}55)-$ not a decimal$]$