Percentage Calculator — Four Essential Modes

Our percentage calculator helps you solve common percentage problems quickly and accurately. Whether you need to calculate a percentage of a number, find what percent one number is of another, calculate percentage change, or add/subtract a percentage, we've got you covered.

Percent of a number: X% of Y = (X × Y) ÷ 100

What percent is A of B: (A ÷ B) × 100%

Percentage change: ((New - Original) ÷ Original) × 100%

Add percentage: Value × (1 + P%) | Subtract percentage: Value × (1 - P%)

How to Use Each Mode

📊 Percent of a number: Enter the percentage and the total number. Example: What is 20% of 200? = 40
🔢 What percent is A of B: Enter the part and the whole. Example: 50 is what percent of 200? = 25%
📈 Percentage change: Enter original and new values. Example: Increase from 100 to 120 = 20% increase
➕ Add/Subtract percentage: Add or remove a percentage from a base value. Example: 200 + 10% = 220

Real-World Applications

Discounts & Sales: Calculate sale prices and savings
Tax Calculations: Add VAT or sales tax to prices
Tips & Gratuities: Calculate tips at restaurants
Grade Calculations: Find test scores and percentages
Investment Returns: Calculate percentage gains or losses
Salary Increases: Calculate pay rises and bonuses

Quick Percentage Reference

10% = divide by 10
20% = divide by 5
25% = divide by 4
50% = divide by 2
75% = multiply by 3/4
100% = the whole amount

Frequently Asked Questions

How do I calculate percentage increase? — (New - Original) ÷ Original × 100%
How do I calculate percentage decrease? — (Original - New) ÷ Original × 100%
What is the percentage formula? — (Value ÷ Total) × 100%
How do I add VAT to a price? — Price × (1 + VAT%)
How do I calculate a discount? — Original Price × (1 - Discount%)

Percentage Calculator