Percentage Calculator

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Percentage Calculator in Common Phrases

What is X% of Y?

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X is what % of Y?

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X is Y% of what?

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Percentage Change Calculator

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Percentage Difference Calculator

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Percentage: Meaning, Formula, Types, and how to calculate percentage of a number

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Percentages are one of the most widely used mathematical concepts in daily life, education, business, finance, and statistics. From calculating discounts and exam scores to analyzing growth, loss, and comparisons, percentages simplify complex numerical relationships by expressing values as parts of 100.
This guide explains what a percentage is, how it is calculated, and provides clear formulas and examples for each type of percentage calculator, including those commonly used online.

What Is a Percentage?

A percentage represents a number as a fraction of 100.
The word percentage comes from the Latin per centum, meaning “per hundred.”
For example:
25% means 25 out of 100
0.25, 25%, and 25/100 all represent the same value
Percentages make it easier to compare values, track changes, and understand proportions in a standardized way.

Basic Percentage Formula

The most fundamental percentage formula is:
Percentage = (Part ÷ Whole) × 100
This formula is the foundation for all percentage-related calculations.

how to calculate percentage of a number​?

What It Calculates?
This type of calculator answers the question:
What is X% of Y?
It is commonly used for:
Discounts
Tax calculations
Commission calculations
Interest calculations
Formula
Result = (Percentage ÷ 100) × Number
Example
What is 20% of 500?
(20 ÷ 100) × 500 = 100
So, 20% of 500 is 100.

What Is X% of Y? (Common Percentage Phrase)

This calculator works exactly like the basic percentage calculation but is phrased in a natural-language format that people commonly search for online.
Formula
X% of Y = (X ÷ 100) × Y
Example
What is 15% of 200?
(15 ÷ 100) × 200 = 30
This calculation is widely used in:
Shopping discounts
Salary bonuses
Tip calculations

X Is What Percent of Y?

What It Calculates?
This calculator determines how much percent one number is of another.
It is useful for:
Exam results
Performance analysis
Profit comparisons
Formula
Percentage = (X ÷ Y) × 100
Example
80 is what percent of 200?
(80 ÷ 200) × 100 = 40%
This means 80 represents 40% of 200.

X Is Y% of What?

What It Calculates?
This calculator finds the original whole value when a percentage and final value are known.
It is commonly used in:
Reverse discount problems
Original price calculations
Financial backtracking
Formula
Original Value = (X × 100) ÷ Y
Example
50 is 25% of what number?
(50 × 100) ÷ 25 = 200
So, the original number is 200.

how to calculate percentage difference

What Is Percentage Difference?
Percentage difference compares two values and shows how different they are relative to their average.
It is especially useful when no value is considered the “original.”
Formula
Percentage Difference = |Value 1 − Value 2| ÷ ((Value 1 + Value 2) ÷ 2) × 100
Example
Find the percentage difference between 40 and 60:
Difference = |40 − 60| = 20
Average = (40 + 60) ÷ 2 = 50
(20 ÷ 50) × 100 = 40%
Percentage difference is widely used in:
Data analysis
Scientific comparisons
Market price comparisons

Percentage Change Calculator

What Is Percentage Change?
Percentage change measures how much a value has increased or decreased compared to its original value.
It is one of the most searched percentage calculations online.

Percentage Increase Formula
Percentage Increase = ((New − Original) ÷ Original) × 100
Example
Price increases from 100 to 120:
(120 − 100) ÷ 100 × 100 = 20% increase

Percentage Decrease Formula
Percentage Decrease = ((Original − New) ÷ Original) × 100
Example
Price drops from 100 to 75:
(100 − 75) ÷ 100 × 100 = 25% decrease
Percentage change calculations are heavily used in:
Economics
Business growth analysis
Stock market evaluation
Salary adjustments

Final Thoughts

Percentages are a fundamental part of mathematics and real-life decision-making. Whether you are calculating discounts, comparing values, measuring growth, or analyzing data, understanding percentage formulas ensures accuracy and confidence.
Our online percentage calculators simplify these calculations by providing instant and accurate results, making them essential tools for students, professionals, and businesses alike.