How do I calculate a percentage of a number?

Divide the percentage by 100 and multiply by the number. For example, 20% of 150 = (20 ÷ 100) × 150 = 30.

How do I calculate percentage increase?

Use the formula: ((New Value − Old Value) ÷ Old Value) × 100. For example, if a price increases from $50 to $65: ((65 − 50) ÷ 50) × 100 = 30% increase.

What is the difference between percentage and percentile?

A percentage is a fraction of 100 (e.g., 85%), while a percentile indicates the rank within a distribution (e.g., 85th percentile means you scored better than 85% of people).

Percentage Calculator

Calculate percentages, increases, decreases, and differences.

Percentages are used everywhere — from shopping discounts and tax calculations to academic grades and financial analysis. Our free percentage calculator makes it easy to perform all common percentage calculations instantly.

What Is a Percentage Calculator?

A percentage calculator is a tool that helps you quickly find percentages, calculate percentage increase or decrease, determine what percentage one number is of another, and more. It eliminates manual math errors and saves time.

Percentages represent a fraction of 100 and are denoted by the % symbol. They are fundamental in mathematics, science, business, and everyday life.

Common Percentage Formulas

Here are the most frequently used percentage formulas:

•Finding a percentage of a number: (Percentage ÷ 100) × Number
•What percentage is X of Y: (X ÷ Y) × 100
•Percentage increase: ((New − Old) ÷ Old) × 100
•Percentage decrease: ((Old − New) ÷ Old) × 100
•Adding a percentage: Number × (1 + Percentage ÷ 100)

Real-World Applications

Percentages are essential in many everyday situations. When shopping, you use them to calculate discounts and sales tax. In finance, they help you understand interest rates, investment returns, and profit margins.

Students use percentages to track grades and test scores. Businesses rely on them for data analysis, market share calculations, and performance metrics.

Tips for Quick Percentage Math

•To find 10% of any number, simply move the decimal point one place to the left
•To find 5%, calculate 10% and divide by 2
•To find 25%, divide the number by 4
•To find 1%, move the decimal point two places to the left
•Combine these shortcuts for complex calculations (e.g., 15% = 10% + 5%)

👉 Try our percentage calculator now for instant, accurate results!

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