Percentage Calculator
4-in-1 percentage calculator — find %, percentage change, increase & decrease
What is X% of Y?
Formula: (15/100) — 200 = 30
X is what % of Y?
Formula: (30/200) — 100 = 15.00%
Percentage Change
📈 Increase of 25.00%
Increase / Decrease by %
+ 20% Increase
600
- 20% Decrease
400
Common Percentages
5% of 200
10
10% of 200
20
15% of 200
30
20% of 200
40
25% of 200
50
30% of 200
60
40% of 200
80
50% of 200
100
75% of 200
150
100% of 200
200
📤 Share this tool
📖 Learn More About Percentage Calculator
Percentage Calculator — Free Online Tool
Calculate percentages instantly with 4 different modes: find X% of a number, determine what percentage one number is of another, calculate percentage change, and increase/decrease a number by a percentage. All calculations happen in real-time as you type.
Common Percentage Calculations
- Shopping discounts — Quickly find the sale price
- Tax calculations — GST, income tax percentages
- Grade calculations — Convert marks to percentage
- Business metrics — Profit margins, growth rates
Frequently Asked Questions
How do I calculate percentage?
To find X% of Y: multiply Y by X and divide by 100. Formula: (X/100) — Y. For example, 15% of 200 = (15/100) — 200 = 30.
How to calculate percentage change?
Percentage change = ((New Value - Old Value) / Old Value) — 100. A positive result means increase, negative means decrease.
What is the difference between percentage and percentile?
Percentage is a ratio out of 100 (e.g., 85% score). Percentile indicates ranking — the 90th percentile means you scored better than 90% of people.
How to calculate discount percentage?
Discount % = ((Original Price - Sale Price) / Original Price) — 100. For example, if a ₹1000 item is selling for ₹750, the discount is 25%.