Original Value

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Original Value

Sometimes we are given a percentage of a number and we need to find the original number. We can solve these problems using the unitary method.

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Original value

  • A jacket in a sale has 20% reduced off the original price and now costs £48. How much did the jacket originally cost?
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What is the current percentage?

  • 20% off the original price means the jacket now costs 80% of it's original value.
  • We need to find what 100% of the original price is.
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Find 100%

  • To convert 80% to 100%, we first divide by 8 to find 10%.
  • We then multiply by 10 to find 100%.
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  • The jacket originally cost £60.

Jump to other topics


1.1Place Value

1.2Factors & Multiples


1.4Fractions, Decimals & Percentages

1.5Growth & Decay

1.6Measurements & Units



3Ratio, Proportion & Rates of Change

4Geometry & Measures



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