Percentage Calculator
Calculate percentages in three different ways.
% of=
is what % of= %
to= %
What is a Percentage?
A percentage is a dimensionless number used to tell how large or small one quantity is relative to another. It represents a part of a whole expressed in hundredths. The symbol "%" is derived from the Latin "per centum," meaning "by the hundred."
Common Formulas Explained
- Percentage of a Number: To find 25% of 200, convert 25% to decimal (0.25) and multiply by 200. Result: 50.
- Find the Percentage: To find what percentage 50 is of 200, divide 50 by 200 (0.25) and multiply by 100. Result: 25%.
- Percentage Change: Used to track growth or decline. Subtract old value from new value, divide by old value, then multiply by 100.
Real-World Applications
Percentages are everywhere: interest rates in finance, discounts in shopping, profit margins in business, and statistics in sports/science. Understanding how to calculate them quickly is a vital life skill.
Quick Conversions
| Percent | Decimal | Fraction |
|---|---|---|
| 1% | 0.01 | 1/100 |
| 10% | 0.10 | 1/10 |
| 25% | 0.25 | 1/4 |
| 50% | 0.50 | 1/2 |
| 75% | 0.75 | 3/4 |
See also Discount Calculator and GST Calculator for specific financial uses.