8:15 GCSE Maths - Reverse Percentages - Calculating The Cost Before The Discount (2026/27 exams)
Clear UK method for finding the original amount before a percentage increase or decrease.
Find the whole when given a part
Find the whole given a fraction, decimal or percentage
2 hand-picked video lessons for this topic, each checked for relevance and clarity, graded by difficulty and labelled by depth. Press play to watch — nothing loads from YouTube until you do.
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5:34 Percent Problem - Use a Percent to Find the Whole
Set up and solve a proportion to find the whole from a known percentage part.