Free Percentage Calculator
Solve common percentage problems for shopping, schoolwork, budgeting, discounts, increases, and everyday calculations.
What is X% of Y?
X is what percentage of Y?
Percentage increase or decrease
What Is a Percentage?
A percentage is a way of describing a number as a part of one hundred. The word percent means “per hundred,” which is why percentages are written with the percent symbol. For example, 25 percent means 25 parts out of 100.
Percentages are used in many ordinary situations. Discounts, tips, tax, exam results, interest rates, business reports, and changes in prices are all commonly expressed with percentages.
How to Calculate a Percentage
To find a percentage of a number, convert the percentage to a decimal and multiply it by the number. For example, 20 percent of 50 is calculated as 0.20 multiplied by 50, which equals 10.
To find what percentage one number is of another, divide the first number by the total and multiply the result by 100. The calculator above performs these steps automatically and displays the result with two decimal places.
Where Percentages Are Used
You may use percentages when comparing prices, calculating a sale discount, checking a budget, measuring business growth, reviewing a test score, or comparing one result with another. Understanding percentage change can also make financial and statistical information easier to read.
Frequently Asked Questions
Can I calculate a discount with this tool?
Yes. Use the first calculator to find the discount amount, then subtract that amount from the original price.
What happens if the total is zero?
A percentage comparison cannot be calculated when the total value is zero. Enter a valid non-zero total.
Does this calculator round the result?
Results are displayed with two decimal places to make them easier to read while keeping the calculation useful for everyday purposes.