Percentage Calculator
Calculate percentages, percentage change, and percentage of a number instantly.
Result
20% of 150 is 30.00
Frequently asked questions
- How do I calculate a percentage of a number?
- Divide the percentage by 100 and multiply by the number. For 20% of 150: (20 ÷ 100) × 150 = 30.
- How is percentage change calculated?
- Percentage change = ((new value − old value) ÷ old value) × 100. A negative result means a decrease.
- Can this handle negative numbers?
- Yes, all three modes work with negative inputs, though "percentage change" is the most common use case for them.