Percentage Calculator
100% PrivateCalculatorsAnswer the four everyday percentage questions, from X percent of Y to percentage change.
Runs entirely in your browser. Your input is not uploaded to Ovatly or anywhere else.
30.00
Worked steps: 20% of 150 = 20 / 100 x 150 = 30.00
- 1Choose the question that matches your problem from the list.
- 2Enter the two numbers; the field labels change to match the question.
- 3Read the result and the worked steps underneath it.
20% of 150 is 30, from the steps shown: 20 / 100 x 150 = 30. Switch the question to 'X is what percent of Y' and enter 30 and 150 to run it backwards and get 20%.
- Results are shown to two decimal places; the underlying calculation keeps full precision.
- In 'what percent' mode the whole cannot be zero, because dividing by zero has no meaningful percentage.
- Percentages above 100 and negative amounts are accepted where they make sense, for example growth past double.
Divide the part by the whole and multiply by 100. That is the second mode in this tool: 45 out of 180 is 45 / 180 x 100 = 25%.
About this tool
The Percentage Calculator handles the four percentage questions people actually meet: what is X% of Y, X is what percent of Y, and increasing or decreasing a value by a percent. Each mode shows its worked steps, so you can see exactly how the answer was reached and reuse the method on paper.
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Part of Ovatly's free tools in Calculators.