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 15% of 200: 200 × 15 ÷ 100 = 30. Our Percentage Calculator makes this easy by doing the calculation automatically. Learn more about percentage calculations from Math is Fun .

What is the difference between percentage increase and percentage of?

Percentage of calculates what a certain percentage of a number equals (e.g., 20% of 100 = 20). Percentage increase calculates how much a value has grown from an original amount (e.g., 100 increased by 20% = 120).

How do I calculate percentage change between two values?

Use our Percentage Change Calculator by entering the original value and the new value. The calculator will automatically determine if it's an increase or decrease and show the percentage change.

Can I use this calculator for financial calculations?

Yes! Our percentage calculator is perfect for financial calculations including discounts, sales tax, interest rates, profit margins, and commission calculations. The high precision ensures accurate financial results. For financial calculation standards, visit FINRA .

How accurate are the percentage calculations?

Our calculator provides high-precision decimal calculations accurate to multiple decimal places. This ensures reliable results for both simple and complex percentage calculations. For mathematical precision standards, check Standards for Mathematical Practice » Attend to precision. .

Can I calculate negative percentages?

Yes, our calculator supports negative percentages and negative numbers. This is useful for calculating decreases, losses, or negative growth rates.

How do I copy the calculation results?

Simply click the "Copy" button next to any result to copy the calculation and result to your clipboard. This makes it easy to paste into other applications or documents.

Is this percentage calculator free to use?

Yes, our percentage calculator is completely free to use. There are no hidden fees, subscriptions, or usage limitations.

Can I use this calculator on my mobile device?

Absolutely! Our calculator is fully responsive and works perfectly on smartphones, tablets, and desktop computers.

What keyboard shortcuts are available?

You can use Enter to calculate results, Escape to clear all inputs, and type numbers and operators directly for faster input. The calculator supports all standard keyboard shortcuts.

📊 Percentage Calculator

Free online percentage calculator for calculating percentages, percentage changes, and percentage of values. Perfect for financial calculations, discounts, and statistical analysis.

Last updated: 2025-10-21 — Compiled and reviewed by Calvin (Math Research, FreeCalculators.app)

📊 Percentage Of

Calculate what a certain percentage of a number equals

Value

Percentage (%)

📈 As Percentage

Find what percentage one value represents of a total

Part

Total

📊 Percentage Change

Calculate the percentage increase or decrease between two values

Original Value

New Value

Our comprehensive percentage calculator provides multiple tools for all your percentage-related calculations. Whether you need to calculate a percentage of a number, find what percentage one value is of another, or determine percentage changes, our calculator handles it all. With three specialized calculators - Percentage Calculator, Percentage Of Calculator, and Percentage Change Calculator - you can solve any percentage problem quickly and accurately. This tool is essential for students, professionals, and anyone dealing with financial calculations, discounts, statistics, or data analysis.

Calculator Features

Discover the powerful features that make our percentage calculator perfect for all your calculation needs.

✓Three specialized calculators for different percentage calculations

✓Real-time calculation with instant results

✓Support for decimal and whole number inputs

✓Copy results to clipboard with one click

✓Responsive design for desktop and mobile devices

✓Keyboard shortcuts for faster input (Enter to calculate, Escape to clear)

✓Clear visual feedback with color-coded results

✓High precision decimal calculations

✓Support for negative numbers and percentages

✓Professional-grade accuracy for financial calculations

How to Use the Percentage Calculator

Learn how to use our percentage calculator effectively for various types of calculations.

1. Choose Your Calculator

Select the appropriate calculator based on your needs: Percentage Calculator for finding a percentage of a number, Percentage Of Calculator for finding what percentage one value is of another, or Percentage Change Calculator for calculating increases or decreases.

2. Enter Your Values

Input the required numbers in the appropriate fields. For example, enter the base value and percentage for percentage calculations, or enter original and new values for percentage change calculations.

3. Get Your Results

Click the Calculate button or press Enter to see your results instantly. The calculator will show the calculation formula and the final result, which you can copy to your clipboard.

Common Use Cases

Explore the various applications of percentage calculations in everyday life and professional settings.

💰Financial Calculations

•Calculate sales tax on purchases
•Determine discount amounts during sales
•Compute interest rates on loans
•Calculate tip percentages for services
•Determine commission rates for sales
•Calculate profit margins and markups

📊Business & Statistics

•Analyze market share percentages
•Calculate employee performance metrics
•Determine growth rates and trends
•Compute survey response rates
•Calculate conversion rates
•Analyze demographic data percentages

🎓Education & Academic

•Calculate test scores and grades
•Determine class attendance percentages
•Compute grade point averages
•Calculate scholarship percentages
•Determine pass/fail rates
•Analyze academic performance trends

🏥Health & Science

•Calculate body fat percentages
•Determine medication dosages
•Compute success rates of treatments
•Calculate mortality rates
•Determine infection rates
•Analyze clinical trial results

Percentage Formulas

Understand the mathematical formulas behind percentage calculations.

Percentage of a Number

Calculate what a certain percentage of a number equals.

Result = (Number × Percentage) ÷ 100

Percentage of Total

Find what percentage one value represents of a total.

Percentage = (Part ÷ Total) × 100

Percentage Increase

Calculate the percentage increase from an original value to a new value.

Increase % = ((New Value - Original Value) ÷ Original Value) × 100

Percentage Decrease

Calculate the percentage decrease from an original value to a new value.

Decrease % = ((Original Value - New Value) ÷ Original Value) × 100

Percentage Calculation Tips

Master percentage calculations with these helpful tips and tricks.

1.Always double-check your decimal placement when working with percentages

2.Use the percentage change calculator to verify your manual calculations

3.Remember that percentage increases and decreases are relative to the original value

4.When calculating compound percentages, apply them sequentially, not additively

5.Use the copy function to save your results for later reference

6.For quick mental calculations, remember that 10% is one-tenth of the number

7.When calculating discounts, subtract the discount percentage from 100% first

8.Use the keyboard shortcuts (Enter to calculate, Escape to clear) for faster workflow

9.For financial calculations, always verify your results with a second calculation

10.Keep track of your calculation history for reference and verification

Frequently Asked Questions

Find answers to common questions about percentage calculations and our calculator.

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