Solve for the unknown Interest rate in each of the following: $($Do not round intermedlate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$.3216.)$

$\backslash$table$[[$Present Value,Years,Interest Rate,,e Value$],[150,5,18,$&$,188],[270,18,$ins,,$733],[30,000,20,\%,,131,051],[29,281,30,$Pr:$,,539,172]]$