How can you use 10% of the meal cost to find a 15% tip? What about a 20% tip?

asked Feb 26, 2017 82.6k views

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5 votes

to find 20%, find 10% and double the answer
to find 15%, find 10% and half the answer and add it on to 10% of the original number

Rmaddy answered Mar 2, 2017

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