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Janet's bill for lunch was $18.00. If Janet would like to leave 10% as a tip, how much should she add to her bill?

 Apr 27, 2017
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10% means: 10 / 100 =0.10, so:

0.10 x 18 =$1.80 Janet will pay in tips.

18 + 1.80 =$19.80 total bill that Janet will pay.

 Apr 27, 2017

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