Percentage Calculator

Calculate percentages, percentage change, difference, increase, and decrease instantly.

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1. Select the calculation type: find X% of Y, percentage change, percentage difference, or increase/decrease. 2. Enter the required numbers in the input fields for your chosen calculation mode. 3. View the calculated percentage result instantly as you type. 4. Switch between modes to perform different percentage operations on the same values. 5. Click the copy button to copy any result to your clipboard.

About This Tool

The Percentage Calculator is a versatile tool that handles every common percentage operation you will encounter. Whether you need to find what X% of Y is, calculate the percentage change between two values, determine the percentage difference, or figure out a value after a percentage increase or decrease, this tool delivers instant and accurate results.

Percentages are fundamental in daily life - from calculating discounts and tips to analyzing financial returns and academic grades. Instead of fumbling with manual formulas or second-guessing your math, this calculator provides a clean interface where you select your operation type and get results immediately. Each mode is tailored with the right inputs and clear output formatting.

Beyond basic calculations, understanding percentage relationships helps with budgeting, data analysis, and making informed decisions. This tool supports all four major percentage operations in a single interface, saving you from hunting for different calculators for each type of problem.

Formula / How It Works

X% of Y = (X / 100) x Y | % Change = ((New - Old) / Old) x 100 | % Difference = (|A - B| / ((A + B) / 2)) x 100

Frequently Asked Questions

Divide the part by the whole and multiply by 100. For example, 25 is 50% of 50 because (25 / 50) x 100 = 50%. Use the "X is what % of Y" mode in the calculator for instant results.
Percentage change measures the change from an original value to a new value and has direction (increase or decrease). Percentage difference compares two values without treating either as the original - it uses the average of both values as the base.
Multiply the original value by (1 + percentage/100). For example, a 20% increase on 150 is 150 x 1.20 = 180. You can also calculate the increase amount separately: 150 x 0.20 = 30.
Yes. Use the percentage decrease mode. Enter the original price and the discount percentage, and the calculator will show you both the discount amount and the final price after the discount.
Percentage change = ((New Value - Old Value) / Old Value) x 100. A positive result indicates an increase, while a negative result indicates a decrease.

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