Free Percentage Calculator
Calculate percentages instantly. Find X% of Y, percentage changes, discounts, and solve any percentage problem.
What is X% of Y?
Common %
10% of 100 = 10
Common %
25% of 80 = 20
Common %
50% of 60 = 30
Common %
15% of 50 = 7.5
Percentage Formulas
How to Use the Percentage Calculator
Choose Your Calculation Type
Select the type of percentage calculation you need: find a percentage of a number, calculate what percent one number is of another, or determine percentage increase/decrease between two values.
Enter Your Numbers
Input the required values into the corresponding fields. For example, enter the base number and percentage for basic calculations, or enter both original and new values for percentage change calculations.
View Instant Results
See your calculated result appear immediately as you type. The tool shows the answer along with a step-by-step breakdown of the calculation formula used.
Copy or Reset
Use the copy button to copy your result to the clipboard for use elsewhere. Click reset to clear all fields and start a new calculation.
Pro tip: Your data is processed entirely in your browser. Nothing is sent to any server, ensuring complete privacy.
About Percentage Calculations
Percentages are used everywhere in daily life, from calculating discounts and tips to understanding statistics and financial reports. Our calculator provides multiple ways to work with percentages, making it easy to solve any percentage-related problem quickly and accurately.
Common Use Cases
- Sales & Discounts: Calculate sale prices and savings
- Tips & Gratuity: Figure out tip amounts at restaurants
- Grades & Scores: Convert scores to percentages
- Financial Growth: Calculate investment returns
- Statistics: Analyze data and trends
Frequently Asked Questions
How do I calculate a percentage of a number?
To calculate a percentage of a number, multiply the number by the percentage and divide by 100. For example, to find 25% of 80, calculate (80 x 25) / 100 = 20. Our calculator does this automatically for you.
How do I find what percentage one number is of another?
To find what percentage X is of Y, divide X by Y and multiply by 100. For example, to find what percent 15 is of 60, calculate (15 / 60) x 100 = 25%. This is useful for calculating test scores, discounts, and more.
How do I calculate percentage increase or decrease?
To calculate percentage change, subtract the original value from the new value, divide by the original value, and multiply by 100. A positive result indicates an increase, while a negative result indicates a decrease.
What is the formula for calculating percentages?
The basic percentage formula is: Percentage = (Part / Whole) x 100. To find a percentage of a number: Result = (Percentage / 100) x Number. For percentage change: ((New - Original) / Original) x 100.
How do I add a percentage to a number?
To add a percentage to a number, first calculate the percentage of that number, then add it to the original. For example, to add 20% to 100: 100 + (100 x 0.20) = 100 + 20 = 120. Alternatively, multiply by 1.20.