Percentage Calculator | Free Online Tool for Quick Calculations

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Quick Percentage Calculations

Solve common percentage problems instantly with our easy-to-use calculators below.

Find Percentage of a Number

What is % of ?

Find What Percent One Number is of Another

is what percent of ?

Calculate Percentage Change

What is the percentage increase/decrease

from to ?

How This Website Can Help You

This website is designed to help you perform quick and accurate percentage calculations for various everyday needs. Whether you're calculating discounts while shopping, working on school assignments, or analyzing financial data, our simple tools make percentage math easy.

Each calculator is optimized for specific percentage questions, saving you time and ensuring precise results without complex manual calculations.

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 divided by 100. For example, to find 15% of 80, calculate: 80 × (15 ÷ 100) = 80 × 0.15 = 12.

How do I find what percentage one number is of another?

To find what percentage one number is of another, divide the first number by the second number and multiply by 100. For example, to find what percentage 25 is of 200: (25 ÷ 200) × 100 = 12.5%.

How do I calculate percentage increase or decrease?

To calculate percentage change, subtract the old value from the new value, divide by the old value, and multiply by 100. For example, if a price changes from $80 to $100: [(100 - 80) ÷ 80] × 100 = 25% increase.

How do I calculate a discount?

To calculate a discounted price, multiply the original price by (1 - discount percentage as a decimal). For example, for a 20% discount on a $50 item: $50 × (1 - 0.20) = $50 × 0.80 = $40.

Common Percentage Applications

Percentages are used in many real-world scenarios. Here are some common applications:

Discounts and Sales

When shopping, calculate the final price after discount percentages to know how much you'll save.

Example: A $80 item with a 25% discount will cost $60.

Tips and Gratuities

Calculate appropriate tip amounts when dining out or receiving services.

Example: A 15% tip on a $45 bill equals $6.75.