7th Grade Math
posted by completeidiot on .
How do you identify whether a ratio is a rate??? Thank you for all help.

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. 
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)