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A resturant charges an automatic 20% tip for groups of 6 or more. A group of 8 people had a bill of $187.How much was their tip?

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The answer is 37.4. The tip of 20 percent multiplied by the cost is 224.4, and when added to the original cost, 224.4 is the answer.
I’d look at it this way: x(1.2) = 187, so solving for x we find that the bill before tip was 187/1.2= 155.83. 155.83 x .20 = 31.17. So 155.83 (bill) plus 31.17 (tip) = 187. So their tip was 31.17

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