1. Calculate Percents & Percentages
2. Percent Discounts (sale price)
3. Percent Markups (increase by)
4. Percent Margin (selling price)
5. Calculate Tips.
6. Percent Difference (Change)
7. Percentage (what % of) i.e. x is what percentage of y

Tip:
Enter any two values and the third is computed e.g. [23]% of [x] = 115. X will be computed (20).

Note:
This is the professional version of the free Percent Calculator. They both have the same functionality except this version has no ads and has support for UI themes and retains previously computed values.