Understanding Percentage Calculations

A percentage calculator makes it easier to understand how one number relates to another as a percentage. Percentages are used every day for discounts, price increases, taxes, tips, grades, budgets, savings goals, and many other common calculations.

Instead of working through the formula manually, you can enter the numbers into the calculator to quickly find the percentage, the percentage of a number, or the result of a percentage change.
 

Why Use a Percentage Calculator?

Percentage calculations can be simple, but they can also become confusing depending on what you're trying to find. For example, finding 20% of a number is different from determining what percentage one number is of another or calculating how much a value increased or decreased.

A percentage calculator helps take the guesswork out of these everyday calculations. It can be especially useful when comparing prices, checking discounts, reviewing changes in expenses, or working with numbers at home, school, or work.
 

Simple Example

Suppose an item normally costs $80 and is on sale for 25% off. Twenty-five percent of $80 is $20, making the discounted price $60 before any applicable taxes or additional charges.

You can also use percentage calculations in reverse. For example, if you scored 45 points out of 50, your score would be 90%.