GCSE Maths - Reverse Percentages - Calculating The Cost Before The Discount (2026/27 exams)

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** WHAT'S COVERED **
1. Calculating the original value of an item after a percentage increase or decrease.
Understanding that the original value represents 100%.
Relating the new value to a percentage of the original value.
2. Method for calculating reverse percentages using the new value.
3. Calculating the original value when given the actual change in value and the percentage change.
Understanding that the value change corresponds to the percentage change.

** EXAM BOARD INFO **
This video is suitable for maths courses around the world.
KS3 - Not on your course
GCSE Foundation - All on your course
GCSE Higher - All on your course
A-level - Basic for your course

** CHAPTERS **
0:00 Intro to Reverse Percentages
0:17 Example 1: Finding Original Price after Increase
2:49 Example 2: Finding Original Price after Decrease (Sale)
4:02 Example 3: Finding Original Price after Decrease (Depreciation)
4:56 Reverse Percentages Using the Value Change
5:09 Example 4: Calculating Original and New Price from Increase Value
6:59 Example 5: Calculating Original Price from Decrease Value

** PLAYLISTS **
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   • GCSE Chemistry (9-1)  

   • GCSE Physics (9-1)  

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