Percentage Calculator
Calculate what X% of Y is, what percent X is of Y, and the percentage increase or decrease between two values.
Your inputs are calculated locally in your browser. No personal data is sent across the network.
How to use this tool
1Step 1
Select your calculation mode.
2Step 2
Enter the numbers.
3Step 3
View the instant result and mathematical explanation.
Frequently asked questions
How is percentage change calculated?
As ((new value - old value) / |old value|) × 100. Positive indicates an increase; negative indicates a decrease.
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