What is a reverse percentage?
A Reverse Percentage question is one where we are are given the value after a percentage increase or decrease and asked to find the value before the change.
How to do reverse percentage questions
You should do these in exactly the same way as Percentage Increase & Decrease questions!
Identify “before” & “after” quantities
- FIND percentage we want:
- Increase – ADD percentage to 100
- Decrease – SUBTRACT from 100
- Write down a STATEMENT connecting “before” and “after”:
“after is a percentage of before”
- Write down the statement as an EQUATION using decimal equivalent
remember “is” means “=”
- SUBSTITUTE and SOLVE
Edexcel GCSE Maths Notes
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