Mathematical Concepts of Ratios and Rates

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Quantity

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An amount or a number of something.

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Rate

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An equivalent ratio that compares the first quantity in a ratio to only one of the second quantity.

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Ratio

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A way to compare two different quantities. Can be written as a fraction, using the word "to", or using a colon.

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Unit rate

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A rate for one of something. Written as a ratio with a denominator of one.

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Rational number

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Any number that can be written as a fraction, where both the numerator and the denominator are integers, and the denominator is not zero.

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Tape diagram

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A visual tool or model used to solve math problems based on ratios and fractions.

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Percent

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A fraction or ratio in which the denominator is 100. A number compared to 100.

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Proportion

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An equation which states that two ratios are equal.