Ratio, Rates, Proportions (Alpha)

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What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

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CCSS.6.RP.A.1

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How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor (GCD).

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CCSS.6.RP.A.1

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What is a rate?

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A rate is a specific kind of ratio that compares two different units, such as speed (miles per hour) or price per item.

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What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

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CCSS.7.RP.A.2A

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How do you solve a proportion?

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To solve a proportion, cross-multiply and then divide to find the unknown value.

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CCSS.7.RP.A.2C

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What is the unit price?

Back

The unit price is the cost per single unit of measure, used to compare prices of different sizes or quantities.

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How do you find the unit price?

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To find the unit price, divide the total price by the number of units.

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CCSS.6.RP.A.1

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What is the ratio of red toy cars to all toy cars if there are 3 red, 2 black, and 5 white toy cars?

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The ratio is 3:10.

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CCSS.6.RP.A.1

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If Melissa drives 238 miles in 5 hours, what is her average speed?

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Her average speed is 48 MPH.

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CCSS.6.RP.A.3B

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What is the simplest form of the ratio of red LEGOs to yellow LEGOs if there are 3 red and 6 yellow?

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The simplest form is 1:2.

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