2 Percentage increase or decrease
In this section, you will look at how to find the result of percentage increases and decreases. You'll also cover repeated changes (for example, what happens if you increase a price by 20%, and then decrease by 20%? It probably isn’t what you expect!). Finally, you'll look at how to undo the effect of a percentage change – for example, finding out what something cost before a sale discount was applied.
OpenLearn - Succeed with Maths – Part 1
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