UseCalculator
Percentage calculator
Find a percentage of an amount, then compare the amount after adding or subtracting it.
Percentage amount30
- After adding
- 180
- After subtracting
- 120
How it works
Part = amount × percentage ÷ 100
20% of 150 is 30. Adding it gives 180; subtracting it gives 120.
This is percentage arithmetic. It does not choose tax rates, discounts, or local rules. Use the same units throughout.
This tool surface is translated. The wider site has partial language coverage; independent language review is pending.