GCSE Maths (AQA)

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Percentage Increase

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Ratio, Proportion and Rates of Change Ratio, Proportion and Rates of Change

Percentage Increase

4:28 Percentage Change
Spec R9
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  • To increase a number by a percentage, add the percentage of the number
  • A percentage is a proportion of a number written as parts out of a hundred
  • To calculate a percentage increase, convert the percentage to a fraction or decimal and multiply it by the original number
  • Another method for calculating a percentage increase is to add the percentage to 100% and apply it to the original number
  • In an example, increasing 420 by 40% results in a new value of 558
  • In another example, a classic car's value increased by 15% over 40 years, resulting in a new value of 17,250 pounds

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