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 DefinitionThe Merriam-Webster dictionary defines a percentage as "a part of a whole expressed in hundredths."
The CurriculumThe lessons are grouped into mini-curriculum to help you organise your learning. A brief description is given for each mini-curriculum. Click the MORE button to learn more.
A percentage is a part of a whole. It expresses a part of a whole number as parts out of 100.
This is 1%. It is 1 part in 100.
Find the Percentage of a Number
Find the percentage of a number by dividing the percentage by 100 then multiplying the answer by the number:
Express as a Percentage of a Number
A number can be expressed as a percentage of another number:
Read more about percentages
Read more about how to find the percentage of a number
Read more about how to express one number as a percentage of another number
A percentage change is the change from one value to another value, expressed as a percentage. Here is an example of a percentage change:
A number increases from 10 to 12. The change (2) is 20% of the original number (10). It is a 20% percentage change.
Find a Percentage Change
Find a percentage change by expressing the change in a number as a percentage of the original number.
Read more about percentage changes
Read more about how to find a percentage change
Convert Percentage to a Fraction
A percentage can be converted to a fraction.
Convert Percentage to a Decimal
A percentage can be converted to a decimal.
Read more about how to convert a percentage to a fraction
Read more about how to convert a percentage to a decimal