Percentage Calculator
Multiple percentage calculations in one place
What is X% of Y?
What is% of=30.00
X is what percent of Y?
is what % of=20.00%
Percentage Change
Fromto=+25.00%
Percentage Increase & Decrease
±%
Increase (+20%)
120.00
Decrease (-20%)
80.00
How to Calculate Percentages
Percentages are used everywhere in daily life — from calculating tips and discounts to understanding interest rates and tax brackets. Our percentage calculator handles the four most common percentage calculations instantly.
Percentage Formulas
- X% of Y: (X / 100) × Y
- X is what % of Y: (X / Y) × 100
- % Change: ((New - Old) / Old) × 100
- % Increase: Value × (1 + Percentage / 100)
Common Percentage Uses
- Shopping: Calculate sale discounts (e.g., 30% off $89.99)
- Tipping: Find 15%, 18%, or 20% tip amounts
- Finance: Understand interest rates and returns
- Taxes: Calculate tax amounts on purchases or income
- Grades: Convert scores to percentages