Understand 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:b'.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

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How do you write a ratio?

Back

Ratios can be written in three ways: using a colon (a:b), as a fraction (a/b), or with the word 'to' (a to b).

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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What does the ratio 3:2 mean?

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The ratio 3:2 means that for every 3 units of the first quantity, there are 2 units of the second quantity.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If there are 8 apples and 4 oranges, what is the ratio of apples to oranges?

Back

The ratio of apples to oranges is 8:4, which simplifies to 2:1.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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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?

Back

The ratio of red toy cars to all toy cars is 3:10.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

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In a class of 30 students, if 12 are boys, what is the ratio of boys to girls?

Back

The ratio of boys to girls is 12:18, which simplifies to 2:3.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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What is a real-life example of a ratio?

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A real-life example of a ratio is the recipe that calls for 4 meatballs for every 1 cup of sauce.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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How do you find the ratio of two quantities?

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To find the ratio of two quantities, divide each quantity by the greatest common divisor (GCD) of both quantities.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a recipe requires 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.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the ratio of volleyball players to total players if there are 10 volleyball players and 36 total players?

Back

The ratio of volleyball players to total players is 10:36, which simplifies to 5:18.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2