Percentage Calculator
Calculate percentages, percentage change, and percentage of a number.
What is % of ?
From to
is what % of ?
How to Use
- Basic: Find what X% of Y equals (e.g., "What is 15% of 200?")
- % Change: Calculate the percentage change between two values
- Find %: Find what percentage X is of Y (e.g., "30 is what % of 150?")
Percentage Formulas
- Basic: Result = (Percent / 100) × Number
- Change: ((New - Old) / Old) × 100
- Find %: (Part / Whole) × 100
FAQ
How do I calculate a tip?
Use the Basic calculator. For a 20% tip on a $50 bill, enter 20% of 50 = $10.
How do I find discount prices?
For a 25% discount on $80, calculate 25% of 80 = $20, then subtract: $80 - $20 = $60.
What does negative percentage change mean?
A negative percentage change indicates a decrease from the original value.