Used Percent for Windows?
Developer’s Description
Percent lets you quickly calculate percentages such as tips, added taxes and price discounts. Easily find a percentage from an amount entered. Calculate the percentage of any number out of any number. Calculate any amount plus any percentage (such as a tax rate) instantly. Perfect for calculating sales tax - it will work in any country. Calculate prices after discount. Easily find a percentage if you know the original and final amounts. Check you were given the right discount or tax rate.
