GCSE Secondary Maths Age 13-17 - Ratio, Proportion & Rates of Change: Percentages - Explained

The video tutorial explains how to solve a reverse percentage problem using a bread weight example. It starts by introducing the concept of reverse percentages and then presents a problem where a loaf of bread loses 12% of its weight during baking. The goal is to find the original weight of the bread before baking. The tutorial walks through the calculation steps, verifies the solution, and discusses the marking scheme. It concludes with tips on identifying reverse percentage problems.

What is the percentage loss of weight when the loaf of bread is baked?

If Claire wants the baked loaf of bread to weigh 1.1 kilograms, what was the original weight before baking?

Explain how to calculate the original weight of the loaf of bread using reverse percentages.

What does it mean when a problem states that something loses 12% of its weight?

Why is this problem categorized as a reverse percentage question?