# Percentage Calculator, Formulae, Examples, & Definition

A percentage calculator is a free online tool that helps you calculate percentages.

Calculate Percentage → | Change | ||

Increase | Decrease | Difference | |

Convert → | Percent To Fraction | Percent To Decimal | Percent To PPM |

Fraction To Percent | Decimal To Percent | PPM To Percent |

## How To Calculate Percentage Of A Number?

To calculate the percentage of a number,** divide the part by the whole,** and then** multiply it by 100%**.

The formula to calculate percentage of a number is
**
$P=(X/Y)\times 100\%$
**,
where

X is the part of the whole, and

Y is the whole value.

The excel and google sheets formula to calculate percentage of a number is =(A1 / B1) × 100

Where the value of X (part of the whole) is in cell A1, and

Value of Y (whole value) is in cell B1

**Example 1: 30 of 200 is what percent?**

Using the formula,
$P=(X/Y)\times 100\%$
, we have:

X = 30

Y = 200

We get
$P=(\mathrm{30}/\mathrm{200})\times 100\%$

P = 15%

**Example 2: 40 of 60 is what percent?**

Using the formula,
$P=(X/Y)\times 100\%$
, we have:

X = 40

Y = 60

We get
$P=(\mathrm{40}/\mathrm{60})\times 100\%$

P = 66.666%

## What Is The Percentage Definition?

Percentage is the **number or ratio** represented as a** fraction of 100** or a** part of a hundredth**. It’s a** unit of proportion** which is an instance of** parts per notation** and is a** dimensionless quantity** with no standard unit of measurement.

The term percentage is derived from the Latin word “ **per centum**” which means** “by a hundred”.** The subdivision of percentage is** per mille. **The relation between percent and per mille is:

**1 percentage (1%) = 10 per mille (10‰)**

The value of percentage ranges from 0 to 100 when measured as a part of the whole but can hold any real number value when measuring relative change.

### What Is The Percentage Sign?

The percent sign is $\%$.

To access the percent sign on the keyboard, press ** Shift + 5 on windows** and

**.**

`Cmd`+`5`on macIn programming languages, $\%$ sign is used as a modulus operator.

### What Are The 3 Abbreviations Of Percentage?

The 3 abbreviations of percentage are** pct.**,** pct**, and** pc**.

#### What Are Percentage Points?

Percentage point is a unit for measuring the arithmetic difference between two percentage values.

For example, if a quantity increases from 20% to 25%, it has increased by 5 percentage points.

Percentage points have 3 abbreviations including **pp**, **p.p.**, or **%pt**.

#### What Is A Percentile?

A percentile is a **statistical measure** that indicates the value below which a given percentage of observations in a group of observations falls.

For example, the 20th percentile is the value below which 20% of the observations may be found.

Percentiles are commonly used to report scores in standardized tests, to assess relative standing within a population, and to analyze data distribution in various fields such as economics, education, and healthcare.