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5 votes
Backpack discounted 10% on sale for $37.80

1 Answer

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Well we have to think logically here. In math terms, 10% on sale is 10% off. Off of what? Well, 100! So you want to find 90% of 37.80. You can do this by multiplying it by it's decimal, or .9 in this case.
User Wiswit
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