How do I convert a fraction to a percentage?

Divide the numerator by the denominator, then multiply by 100. For example, 3/8 as a percentage: (3 / 8) x 100 = 37.5%. This works for any fraction.

What is the difference between percentage change and percentage points?

Percentage change is relative to the original value, while percentage points measure an absolute difference. If interest rates go from 5% to 7%, that is a 2 percentage point increase but a 40% percentage change ((7-5)/5 x 100).

How do I calculate a percentage markup?

Markup percentage = ((Selling Price - Cost) / Cost) x 100. For example, if an item costs $40 and sells for $60: ((60-40) / 40) x 100 = 50% markup. Use the increase mode of our calculator.

Can I use percentages greater than 100%?

Yes. A percentage above 100% means the value is more than the whole reference amount. For example, a 200% increase on $50 means the value grew by $100 to reach $150. Our calculator handles any percentage value.

How do I reverse-calculate a percentage?

To find the original number when you know the result and the percentage, divide the result by the percentage expressed as a decimal. For example, if 30 is 25% of some number: 30 / 0.25 = 120. Switch to the 'What %?' mode to explore this.

Percentage Calculator - Free Online Percent Tool

Calculate percentages, percentage change, increase, and decrease online for free. Solve any percent problem instantly with step-by-step results.

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Calculation Type

What is% of

50.00

Formula: (25/100) × 200 = 50.00

How to Use the Percentage Calculator

1

Choose a Calculation Mode

Select one of five modes: percentage of a number, what percent one number is of another, percentage change between two values, increase by a percentage, or decrease by a percentage.
2

Enter Your Values

Type the numbers into the input fields. For example, in '% of Number' mode, enter the percentage and the base number. All fields accept decimals.
3

View the Result Instantly

The answer updates in real time as you type. The formula used is displayed beneath the result so you can verify the math or learn the method.
4

Try Quick Examples

Click any quick-example button (discount, tip, grade, change) to pre-fill realistic values and see how each calculation mode works in practice.

Common Use Cases

Shopping Discounts

Find the sale price of an item after a 15%, 25%, or 50% discount. Enter the original price and the discount percentage to see exactly how much you save.

Finance and Investing

Calculate return on investment, interest earned, or portfolio growth. Percentage change mode shows how much a stock, fund, or account balance has moved.

Academic Grading

Convert test scores to percentages. If you scored 42 out of 50, the calculator instantly shows 84%. Useful for students, teachers, and parents.

Business Markup and Margin

Determine the markup on goods or the profit margin on sales. Use the increase mode to price products and the change mode to compare revenue over time.

Why use this?

Percentages are everywhere.

The Percentage Calculator on FindUtils handles every common percentage operation in one place. Whether you need to find what percentage one number is of another, calculate a percentage increase or decrease, or determine the result of applying a percent to a value, this tool delivers instant answers with the formula shown so you understand the math behind each result.

Percentages appear in nearly every area of daily life. Shoppers use them for tips and discounts, students convert raw scores to grades, investors track portfolio returns, and businesses measure profit margins and ROI. Having a reliable, fast calculator removes guesswork and avoids costly arithmetic mistakes.

For more complex financial math that builds on percentages, explore the Compound Interest Calculator to see how repeated percentage growth compounds over time, or use the VAT Calculator to add or remove tax from a price. If you need to convert between measurement units rather than percentages, the Unit Converter covers hundreds of unit pairs.

How It Compares

Many percentage calculators online are cluttered with ads or limited to a single calculation type. The FindUtils Percentage Calculator offers five distinct modes in a clean, ad-light interface that works entirely in your browser -- nothing is uploaded to a server. Unlike mobile apps that require installation, this tool runs on any device with a web browser and needs no signup or account.

Compared to spreadsheet formulas, a dedicated percentage calculator is faster for one-off questions. You do not need to remember whether to use the formula =(B2-A2)/A2 or =A2*(1+B2). Just pick a mode, enter your numbers, and the answer appears instantly with the underlying formula visible for learning.

Tips for Working with Percentages

To find 10% of any number quickly, just move the decimal point one place to the left.

Percentage of and percentage from are interchangeable: 8% of 50 equals 50% of 8.

When comparing two percentage changes, always check whether the base value is the same to avoid misleading conclusions.

A 50% decrease followed by a 50% increase does not return you to the original value; you end up at 75% of where you started.

For compound changes, multiply the factors instead of adding percentages: two successive 10% increases yield 1.1 x 1.1 = 1.21, or a 21% total increase.

Frequently Asked Questions

How do I calculate a percentage of a number?

To find X% of a number, multiply the number by X and divide by 100. For example, 20% of 150 is: 150 × 20 / 100 = 30. Our calculator does this automatically.

How do I calculate percentage increase?

Percentage increase = ((New Value - Original Value) / Original Value) x 100. For example, if price went from $50 to $60: ((60-50) / 50) x 100 = 20% increase.

How do I calculate percentage decrease?

Percentage decrease = ((Original Value - New Value) / Original Value) x 100. For example, if price dropped from $100 to $75: ((100-75) / 100) x 100 = 25% decrease.

What is X as a percentage of Y?

To find what percentage X is of Y, divide X by Y and multiply by 100. For example, 25 is what % of 200? (25 / 200) x 100 = 12.5%.

How do I calculate the original price after a discount?

Original price = Discounted price / (1 - Discount%/100). For example, if $80 is after 20% discount: $80 / (1 - 0.20) = $80 / 0.80 = $100 original price.

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How to Use the Percentage Calculator

Choose a Calculation Mode

Enter Your Values

View the Result Instantly

Try Quick Examples

Common Use Cases

Shopping Discounts

Finance and Investing

Academic Grading

Business Markup and Margin

Why use this?

How It Compares

Tips for Working with Percentages

Frequently Asked Questions

How do I calculate a percentage of a number?

How do I calculate percentage increase?

How do I calculate percentage decrease?

What is X as a percentage of Y?

How do I calculate the original price after a discount?

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