reverse percentages
What reverse percentages means in Mathematics GCSE, as defined for Pearson Edexcel.
Definitions of reverse percentages
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Reference: Pearson Edexcel
Undoing the multiplier to find an original value, so a price of £42 after a 20% rise came from £42 ÷ 1.2 = £35.
The idea reverses as well, so if a price after a 20% rise is £54, the original is 54 ÷ 1.2, which is £45.
Topics that use reverse percentages
- Number - Fractions, decimals and percentages (Pearson Edexcel GCSE)
- Ratio, proportion and rates of change (Pearson Edexcel GCSE)
Related terms
- Equivalent ratios
- Part-to-part fraction
- Part-to-whole fraction
- percentage
- percentage multipliers
- Ratio
- Scale factor
- simplest form
Using reverse percentages in the exam
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