Percentage Calculator
A multi-mode percentage calculator covering all common scenarios: percentage of a number, percentage change between values, percentage difference, and adding/subtracting percentages. Instant results as you type.
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About Percentage Calculator
## Percentage Calculations
Percentages express a number as a fraction of 100. They're used everywhere — discounts, taxes, statistics, growth rates, and more.
### Formulas
| Calculation | Formula |
|-------------|---------|
| **X% of Y** | `Y × (X / 100)` |
| **% change** | `((new - old) / old) × 100` |
| **% difference** | `(|a - b| / ((a + b) / 2)) × 100` |
| **Add X%** | `value × (1 + X / 100)` |
| **Subtract X%** | `value × (1 - X / 100)` |
### Common use cases
- **Sales tax** — "What is 7% of $85?" → $5.95
- **Discounts** — "25% off $120" → $90
- **Growth** — "Revenue went from $10K to $15K" → 50% increase
- **Tips** — "18% tip on $45" → $8.10
Why Use VTX Labs?
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