Solve for the unknown interest rate in each of the following:

Note: Do not round intermediate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$.,32$

$\backslash$table$[[$Present Value,$\backslash$table$[[$Years$],[7]],$Interest Rate,Future Value$],[$$$,780,\%,1,511],[,970,8,\%,1,848],[,21,500,19,\%,148,332],[,76,800,22,\%,325,815]]$