Percentage Calculator
Free online percentage calculator with multiple modes. Calculate what is X% of Y, X is what percent of Y, and percentage increase/decrease with clear step-by-step breakdowns.
What is X% of Y?
X is what % of Y?
Percentage Change
How to Use Percentage Calculator
Choose Mode
Select calculation type.
Enter Values
Type numbers.
Get Result
See percentage with step-by-step.
Who Uses Percentage Calculator?
Students, shoppers calculating discounts, business owners computing margins, teachers grading, stock investors tracking changes.
Why Use Our Percentage Calculator?
Multiple modes: X% of Y, % of, % change
Tab interface for easy switching
Instant results with breakdown
Free unlimited calculations
Frequently Asked Questions
How do I calculate X% of Y?
Multiply Y by X and divide by 100. Example: 15% of 200 = 200 x 15/100 = 30.
How to find percentage increase?
Percentage increase = ((New Value - Old Value) / Old Value) x 100. Example: 50 to 75 = ((75-50)/50) x 100 = 50% increase.
What is the percentage of X out of Y?
Divide X by Y and multiply by 100. Example: 45 out of 60 = (45/60) x 100 = 75%.
Can I calculate percentage decrease?
Yes, percentage decrease = ((Old Value - New Value) / Old Value) x 100. A drop from 100 to 80 is a 20% decrease.
How do I reverse a percentage?
To find the original number before a percentage was applied, divide the result by (1 + percentage/100).