Key points
- Calculations often give a decimal answer.
- It can be useful to convert a decimal to a percentageA fraction expressed as the number of parts per hundred and recorded using the notation % as a percentage is often easier to understand.
- To do these conversions, you need to be able to multiply by 100
How to convert a decimal to a percentage
- Multiply the decimal by 100 to get the percentage value.
- Write the percentage value and add the percentage symbol %
When the decimal has a value greater than one whole, the percentage will be greater than 100%. Eg the decimal 1∙2 converts to 120%
Examples
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Questions
What is 0∙8 as a percentage?
Multiply 0∙8 by 100 to find the percentage value.
0∙8 x 100 = 80
0∙8 is 80%
What is 1∙6 as a percentage?
Multiply 1∙6 by 100 to find the percentage value.
1∙6 x 100 = 160
1∙6 is 160%
Practise converting decimals to percentages
Try this quiz to practise converting decimals to percentages.
Quiz
Real-world maths
Converting decimals to percentages can be a valuable skill for anyone who publishes or presents data. This could include scientists, journalists, retailers and engineers.
A journalist may investigate employment statistics and find that a company has given a pay rise to 0∙8 of its staff. The figure is expressed as a decimal (0∙8) and so the journalist needs to converts this to a percentage (80%) to make the information easier for their readers to understand. The published article states that: “80% of staff received a pay rise.”
Game - Divided Islands
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More on Fractions
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