Intro to Ratios

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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 to b' or a:b.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you write a ratio in fraction form?

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A ratio can be written in fraction form by placing the first quantity over the second quantity, for example, a:b can be written as a/b.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is an equivalent ratio?

Back

An equivalent ratio is a ratio that expresses the same relationship between quantities, even if the numbers are different, such as 1:2 and 2:4.

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CCSS.6.RP.A.3A

Front

How do you find an equivalent ratio using multiplication?

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

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CCSS.6.RP.A.3A

Front

How do you find an equivalent ratio using division?

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To find an equivalent ratio using division, 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 ratio of apples to plums if there are 5 apples and 2 plums?

Back

The ratio of apples to plums is 5 to 2 or 5:2.

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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 or 2:3.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you calculate distance traveled if speed and time are known?

Back

Distance can be calculated using the formula: Distance = Speed × Time.

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CCSS.6.RP.A.3B

Front

If a team travels at a speed of 70 mph for 2 hours, how far do they travel?

Back

They travel 140 miles (70 mph × 2 hours = 140 miles).

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CCSS.6.RP.A.3B

Front

What is the ratio of 15 to 30?

Back

The ratio of 15 to 30 simplifies to 1:2.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2