a comparison of two quantities by division

a ratio comparing number with different units

a rate in which the second quantity is 1

an equation stating that two ratios are equivalent

the process of carrying units throughout a computation. For example, to convert 90 minutes to hours, multiply by 1 hour/60 minutes. Minutes will cancel out and you will be left with 1.5 hours.

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Ratios and Proportions

Term	Definition
Ratio	a comparison of two quantities by division
Rate	a ratio comparing number with different units
Unit Rate	a rate in which the second quantity is 1
Unit Price	the price per 1 item/unit
Proportion	an equation stating that two ratios are equivalent
Dimensional Analysis	the process of carrying units throughout a computation. For example, to convert 90 minutes to hours, multiply by 1 hour/60 minutes. Minutes will cancel out and you will be left with 1.5 hours.