Ratio and Unit Rate

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What is a ratio?

Back

A ratio is a comparison of two quantities that shows how many times one value contains or is contained within the other.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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How do you write a ratio?

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A ratio can be written in three ways: using a colon (e.g., 3:1), as a fraction (e.g., 3/1), or with the word 'to' (e.g., 3 to 1).

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity of one.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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How do you find the unit rate?

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To find the unit rate, divide the first quantity by the second quantity.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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If a store has 120 customers in 6 hours, what is the unit rate in customers per hour?

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20 customers per hour.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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Lynnette can wash 95 cars in 5 days. How many cars does she wash each day?

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19 cars per day.

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CCSS.3.OA.A.3

Front

What is the simplest form of the ratio 24 passengers in 8 cars?

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3:1.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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How do you simplify the ratio 2:10?

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The simplified form is 1:5.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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If you spend $40 on 5 pounds of concrete, what is the unit rate in dollars per pound?

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$8 per pound.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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What does it mean to simplify a ratio?

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To simplify a ratio means to reduce it to its simplest form where the two numbers have no common factors other than 1.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2