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$.,32\mathrm{.}16.$

$\backslash$table$[[$Present Value,Years,Interest Rate,Future Value$],[s,735,\%,1,421],[,925,7,\%,1,758],[,17,000,18,\%,143,832],[,72,300,21,\%,316,815]]$