college math

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The ratio of soda to diet soda in Bill's Supermarket is 8 to 9. If a person counted 72 bottles of soda, how many bottles of diet soda are there?

  • college math -

    S = # of soda cans = 72
    D = # of diet soda cans

    S/D = 8/9 = 72/D

    D = (9/8)*72 = 81

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