Ratios & Proportions

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What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a:b'.

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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 determine if a relationship is proportional?

Back

A relationship is proportional if it can be represented by a straight line that passes through the origin (0,0).

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CCSS.7.RP.A.2D

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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 per one unit of another quantity.

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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 2:3.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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How do you find the equivalent ratio?

Back

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

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CCSS.6.RP.A.3A

Front

What is the unit rate of 120 miles in 2 hours?

Back

The unit rate is 60 miles per hour.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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If Shawnte drinks ½ of a 6-ounce glass of water in 2/3 hour, how much does she drink in 1 hour?

Back

Shawnte drinks 4.5 ounces in 1 hour.

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CCSS.7.RP.A.1

Front

What is the ratio of oatmeal cookies to chocolate chip cookies if there are 5 oatmeal and 6 chocolate chip cookies?

Back

The ratio of oatmeal to chocolate chip cookies is 5:6.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a crew paves 2/15 mile in 20 minutes, how much will they pave in 1 hour?

Back

They will pave 2/5 mile in 1 hour.

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CCSS.7.RP.A.1