Free everyday math
Percentage Calculator
Solve percentage questions, changes, increases, and decreases with the formula shown in plain language.
- Instant answer
- Private in your browser
- No signup or download
What is a percentage of a number?
Answer
30
20 ÷ 100 × 150 = 30
Three simple steps
How to use it
- Choose the sentence that matches your question.
- Enter the two numbers and get an instant answer.
- Check the worked formula or copy the result for later.
Private by default
Your entries and results stay in this browser tab. Bookify does not upload, save, or sell the numbers you enter here.