How to calculate percent of a number?
Enter the number and percent in the fields and click Calculate. The calculator instantly shows the result using: Number × Percent / 100. Example: 20% of 500 = 100. All calculations happen locally in your browser — no data is sent anywhere.
How to calculate sum with percent?
Enter the number and percent — the calculator shows the total with percent using: Number × (1 + Percent / 100). Example: 500 + 20% = 600. The percent subtraction result is also available for discount calculations.
Percent Calculation Formulas
| Operation | Formula | Example |
|---|---|---|
| Percent of a number | Number × Percent / 100 | 20% of 500 = 100 |
| Sum with percent | Number × (1 + Percent / 100) | 500 + 20% = 600 |
| Sum minus percent | Number × (1 − Percent / 100) | 500 − 20% = 400 |
| Percent between numbers | (A / B) × 100 | 300 of 1200 = 25% |