6.1 & 6.12 Ratios, Rates, & Proportions

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What is a ratio?

Back

A ratio is a comparison of two quantities, showing 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

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common factor (GCF).

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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What is a rate?

Back

A rate is a specific kind of ratio that compares two quantities with different units, such as miles per hour.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

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 find an equivalent ratio?

Back

To find an equivalent ratio, multiply or divide both terms of the ratio by the same non-zero number.

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CCSS.6.RP.A.3A

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What is the formula for calculating unit rate?

Back

Unit rate = Total quantity / Number of units.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a recipe calls for 2 cups of flour for every 3 cups of sugar, what is the ratio of flour to sugar?

Back

The ratio of flour to sugar is 2 to 3.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you determine which is the better buy?

Back

To determine the better buy, compare the unit prices of the items.

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CCSS.6.RP.A.3B

Front

What is the unit price of a 12 ounce can of corn for $1.92?

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Unit price = $1.92 / 12 ounces = $0.16 per ounce.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the unit price of a 20 ounce can of corn for $3.00?

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Unit price = $3.00 / 20 ounces = $0.15 per ounce.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2