What is the formula to find the percentage of a number?

Multiply the number by the percentage fraction: (Percentage / 100) * Number. For example, 20% of 150 = (20 / 100) * 150 = 30.

How do I calculate a reverse percentage (finding original price before discount)?

Original Price = Sale Price / (1 - (Discount % / 100)). For example, if an item is $80 after a 20% discount, the original price was $80 / 0.8 = $100.

Does this tool support negative numbers and decimals?

Yes, you can input decimals and negative percentages for financial adjustments and scientific calculations.

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Math Tools

Percentage Calculator

Calculate percentages, find percentage increase or decrease

Instant Results100% Client-Side Privacy100% Free Utility

Universal Percentage Calculator

Solve any percentage problem instantly: find percentages of numbers, percentage increases/decreases, percentage changes, and reverse tax/discount values.

Calculate Percentage Value

Percentage (X%)

Of Number (Y)

Presets:

What is 15% of 240?

(15 ÷ 100) × 240 = 36

Step-by-Step Working Out

1Convert the percentage to a decimal: 15% = 0.15

2Multiply the decimal by the total number: 0.15 × 240

3Final Answer = 36

About Percentage Calculator

An all-in-one percentage calculation engine to solve percentage of a number, percentage increase/decrease, percentage change, and fractional discounts instantly. Features step-by-step mathematical breakdowns for quick learning.

Why Choose Our Percentage Calculator

Feature	Smart Toolverse	Others
Multi-Mode Solver	Percentage of, percentage change, increase, decrease & reverse percentage	Single basic percentage formula only
Formula Transparency	Shows clear mathematical steps and formulas used	Outputs black-box numbers only
Instant Execution	Live results computed as you type numbers	Page reloads on submission
Clean UI	Mobile-friendly design with 1-click answer copy	Cluttered with popup ads

Common Uses & Applications

Used by shoppers calculating sale discounts and sales tax, investors measuring stock portfolio gains and profit margins, students solving math assignments, and business analysts computing percentage differences.

Frequently Asked Questions

Percentage Change = ((New Value - Original Value) / |Original Value|) * 100. If the result is positive, it indicates a percentage increase; if negative, a percentage decrease.