Percentage Calculator
Calculate what is X% of Y, what percent X is of Y, and more percentage values.
Percentage Calculator
Calculate what is X% of Y, what percent X is of Y, and more percentage values.
Real-World Examples
Finding a tip at a restaurant
What is 18% of $85?
$15.30
Calculating a test score
If you scored 42 out of 50, what percentage is that?
84%
Finding a sale discount
A $60 item is on sale for 25% off. How much is the discount?
$15.00
Common Mistakes to Avoid
Forgetting to convert the percentage to a decimal before multiplying
Fix: Always divide the percentage by 100 first, then multiply.
Dividing by zero when the original value is 0
Fix: Check that the denominator is not zero before dividing.
Confusing percentage increase with absolute increase
Fix: A change from 50 to 75 is a 50% increase, not 25% — the base matters.