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21 March, 13:47

A store is having a 20% off sale. Michael says that he can find the sale price of an item that has regular price of p be evaluating the expression 0.8p. Susan says that she can find the sale price for the same item by evaluating the expression p - 0.2p. Who is correct?

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  1. 21 March, 14:07
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    Both are correct methods because the regular price is p or 1.0p. To find 80%, you can use 0.8p. Or to deduct 20%, you can subtract 20% from the full price.
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