Solve for the unknown interest rate in each of the following: $($Do not round intermediate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

$\backslash$table$[[$Present Value,$\frac{\text{Y}\text{e}\text{a}\text{r}\text{s}}{4},$Interest Rate,Future Value$],[$$$,160,9\mathrm{.}96,\%,$$$,192],[,280,18,,\%,,733],[,31,000,19,,\%,,128,034],[,30,261,25,,\%,,350,964]]$