#### Revision Notes

##### 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

1. FIND percentage we want:
• Increase – ADD percentage to 100
• Decrease – SUBTRACT from 100
2. Write down a STATEMENT connecting “before” and “after”:
“after is a percentage of before”
3. Write down the statement as an EQUATION using decimal equivalent
remember “is” means “=”
4. SUBSTITUTE and SOLVE

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