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arithmetic

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To calculate a 15% tip on a $24 bill a customer adds $2.40 and half of $2.40, or $1.20, to get $3.60. Is this method valid? Why or why not?

  • arithmetic - ,

    Yes. That's the way I calculate a tip.

    10% of 24 is 2.40.
    Half of 2.40 is 1.20.

    2.40 + 1.20 = 3.60

  • arithmetic - ,

    10% + half of 10% = 15%

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