8:15 GCSE Maths - Reverse Percentages - Calculating The Cost Before The Discount (2026/27 exams)
Clear, well-structured walkthrough of finding the original amount after an increase or decrease.
Jump to 0:17Example 1: Finding Original Price after Increase2:49Example 2: Finding Original Price after Decrease (Sale)4:02Example 3: Finding Original Price after Decrease (Depreciation)5:09Example 4: Calculating Original and New Price from Increase Value6:59Example 5: Calculating Original Price from Decrease Value