Using Percentages to Increase Quantities N7

In this resource from the DfE Standards Unit, students make links between percentages, decimals and fractions, represent percentage increase and decrease as multiplication and recognise the inverse relationship between increases and decreases. Most students will have met these concepts before, however, many will have been introduced to the ideas in a procedural manner (“this is how you calculate a percentage of a quantity”) rather than in a conceptual one. Gaps and misconceptions will remain. Typically, for example, we find that learners believe an increase of 50% followed by a decrease in 50% takes us back to the original value. This session will confront such misconceptions and build new conceptual links between percentages, decimals and fractions. (GCSE grades D-G)

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