Review ratios, rate, and proportions

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Review ratios, rate, and proportions

• Ratio is one quantity in comparison to
  another.
• Rate is the quotient of two measures
• Proportions are two equivalent ratios

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Ratios are written in 3 ways a/ba to ba
bAll are read the ratio of a to b
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Rate is the quotient of a to b.typing 120 words
in 3 minutes is the rate of 40 words per minute
(wpm)
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Common ratesmiles per gallon (mpg)miles per
hour (mph)cost per itemprice per pound
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When the cross products of two ratios are equal
we say the ratios are proportional.
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a/b c/d Read this proportion as a is to b as
c is to d
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Cross multiply to determine if two ratios are
proportional like this a x d and b x c