Solve everyday percentage problems in one tool: what is X% of Y, the percentage change from an old value to a new one, and reverse questions like 'X is what percent of Y'. Enter the numbers, press execute, and get a clear step-by-step result you can trust for discounts, grades, markups and stats.
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Change = (new − old) ÷ old × 100. A price from 80 to 100 is a 25% increase; from 100 to 80 is a 20% decrease — the bases differ, which is why direction and wording matter.
0.15 × 240 = 36. The tool shows this as X% of Y so you can verify any similar question.
45 ÷ 60 × 100 = 75%. Use the reverse-percentage mode with the part and the whole.
| Platform | Supported | Offline | Local | Server | Network |
|---|---|---|---|---|---|
| WEB | Yes | Yes | Yes | No | Not required |
| PWA | Yes | Yes | Yes | No | Not required |
| ANDROID | Yes | Yes | Yes | No | Not required |
| IOS | Yes | Yes | Yes | No | Not required |
Compute sale prices and savings from a discount percent.
Measure return on investment from gain and cost.
Project savings growth with compounding interest over time.
Convert length, weight and temperature between metric and imperial units.
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