Percentages Calculator Property: Is Free It does not contain advertising Don't Need Internet Calculates: 1) percentage change between two values 2) Spin-off VAT 3) Increase/Decrease Percentage 4) At The Restaurant tip and Spending Per Person. 5) Discount Calculation. 6) Profit Margin and Markup. 7) Conversion of Fractions into Percentages. 8) Simple percentage