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7th Grade Math

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How do you identify whether a ratio is a rate??? Thank you for all help.

  • 7th Grade Math - ,

    examples of ratios are rates:

    36miles/gallon

    2inches/year
    4cups/recipe
    546mg Salt/DoubleCheesburger
    4inches rise/10ft horizonal
    all those are ratios, and rates.

    Actually, thinking on it, I cant think of a ratio what could not be a rate.

  • 7th Grade Math - ,

    whenever there are not two distinct units, it would not be a rate, since there is no "per" involved

    6m/3 = 2m, a length, not a rate
    3/7 is a number, not a rate

    C/d = pi, a number, not a rate, since both top and bottom have the same unit (length)

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