Solving for I$/$Y means solving for the interest rate that balances the present and future values of a lump sum across n years using this formula:

II$==($FVnPV$)1$n$1$FVnPV$1$n$1$

What interest rate is required to make $$100$ grow to $$150$ in five years?

Enter the data into your calculator:

N$=5$PV$=-100$PMT$=0$FV$=150$

Solve for I$/$Y by pressing CPT I$/$Y$.$

I$/$Y $=$