How to Use the Three Percentage Calculators
Learn how to use each of the three percentage calculator cards to answer the most common percentage questions.
Tool Used
Percentage Calculator
Find the right calculator card
The tool has three cards: 'What is X% of Y?' for finding a portion, 'X is what % of Y?' for finding a rate, and '% change from X to Y?' for finding growth or decline.
Enter your numbers
Fill in the input fields on the relevant card — results update live as you type, so you can experiment without clicking a calculate button.
Interpret percentage change
For the percentage change card, a positive result means an increase and a negative result means a decrease. The formula is (new − old) ÷ old × 100.
Copy the result
Click the copy button next to any result to copy it to your clipboard, ready to paste into a spreadsheet, email, or report.
Clear a card independently
Click Clear on any card to reset just its inputs without affecting the other two calculators — useful when you need to run several different calculations in sequence.
All done!
You are ready to use Percentage Calculator like a pro.