Math tool
Percentage Calculator
Calculate percentages, discounts, increases, decreases and original values instantly. Choose the type of percentage problem, enter your numbers and see the answer with the formula.
Choose calculation type
What is X% of Y?
Find a percentage of any value.
Result
15% of 200 is 30
Formula: 200 x 15 / 100 = 30
Calculation details
Percentage
15%
Number
200
Answer
30
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Free online percentage calculator
ZingoTools Percentage Calculator helps you solve everyday percent problems quickly. Use it for shopping discounts, price increases, school work, tax estimates, business markups, savings goals, comparisons and general maths checks.
Choose the calculation that matches your question, enter the values and the calculator shows the answer with a simple formula. Everything runs in your browser, so there is no account, no sign-up and no data stored by ZingoTools.
Common percentage formulas
- Percent of a number: value x percentage / 100.
- What percent: part / whole x 100.
- Percentage change: (new value - old value) / old value x 100.
- Discount price: original price - (original price x discount / 100).
- Original value after increase: final value / (1 + percentage / 100).