Formula Module how to convert to percentage

Formula Module how to convert to percentage

Hello There,

I have create a formula field and i want the outcome to be in percentage how do i do that

This is my formula ${Deals.Forecast Revenue Per Year}/${Deals.Annual Processing Volume}

I have try ${Deals.Forecast Revenue Per Year}/${Deals.Annual Processing Volume}*100,%

In my formula return type i am only given decimal, string, boolean