# Fractions and Percentages (Mathematics Curriculum)

# Percentages

## What Is a Percentage?

A percentage is a part of a whole. It expresses a part of a whole number as parts out of 100.

A percentage is written as a number followed by the percentage symbol % (said as "percent"):

This is 20% (said as "20 percent"). It means 20 parts out of 100.

A grid with 100 squares is a useful way of visualizing percentages. In the grid below, 20 out of 100 squares are colored blue. 20% of the squares are blue.

### Dictionary Definition

The Merriam-Webster dictionary defines a percentage as "a part of a whole expressed in hundredths."

## Percentages

A percentage is a way of expressing a part as a proportion of a whole.

In this mini-curriculum, you will learn the basics of percentages.

## Percentage Changes

A percentage change is the change from one value to another value, expressed as a percentage.

In this mini-curriculum, you will learn about how to find percentage changes.

## Converting Percentages

Percentages are just one way of expressing a part of a whole. Fractions and decimals are other ways.

In this mini-curriculum, you will learn how convert a percentage to a fraction and a decimal.