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Percentage formulas
9 formulas for Percentage, from the Arithmetic & Quantitative Aptitude section of the Quantix formula library. Tap 🧮 next to a formula to solve it for any variable with step-by-step working.
| Name | Formula | Note |
|---|---|---|
| Percentage | x% of N = x · N / 100 | |
| Percentage change | (New − Old) / Old × 100 | |
| Increase by x% | New = Old × (1 + x/100) | |
| Decrease by x% | New = Old × (1 − x/100) | |
| Successive change | Net % = x + y + xy/100 | use negative for decrease |
| Price rises x%, keep expense same | Reduce consumption by x/(100 + x) × 100 % | |
| A is x% more than B | B is x/(100 + x) × 100 % less than A | |
| Population after n years | P(1 + r/100)ⁿ | |
| Depreciation after n years | P(1 − r/100)ⁿ |
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