Percentage Calculator
Percentage Calculator
Understanding Percentages
Percentages are a fundamental part of mathematics and are used everywhere in daily life, from calculating a discount at a store to understanding financial reports. A percentage is simply a fraction of 100. This calculator helps you solve the three most common types of percentage problems quickly and easily.
How to Use This Calculator
Select the type of calculation you want to perform from the tabs at the top, then fill in the corresponding fields. The result is calculated for you in real time.
| To Calculate... | Use It To... |
|---|---|
| What is X% of Y? | Find a percentage of a given number, like calculating a 15% tip on a $50 bill. |
| X is what % of Y? | Express one number as a percentage of another, like finding what percentage of your income goes to rent. |
| % Change from X to Y | Calculate the percentage increase or decrease between two numbers, like tracking investment growth. |
The Formulas for Percentage Calculations
Here are the simple mathematical formulas this calculator uses for each operation:
| Calculation | Formula | Example |
|---|---|---|
| What is X% of Y? | (X / 100) * Y |
What is 20% of 150? (20 / 100) * 150 = 30 |
| X is what % of Y? | (X / Y) * 100 |
15 is what % of 60? (15 / 60) * 100 = 25% |
| Percentage Change from X to Y | ((Y - X) / X) * 100 |
What is the % change from 50 to 75? ((75 - 50) / 50) * 100 = 50% Increase |