Part to Part and Part to Whole 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.

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What does 'part to part' ratio mean?

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A part to part ratio compares different parts of a whole, such as the number of boys to girls in a class.

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What does 'part to whole' ratio mean?

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A part to whole ratio compares a part of a group to the entire group, such as the number of dogs to the total number of animals.

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How do you simplify a ratio?

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To simplify a ratio, divide both parts of the ratio by their greatest common divisor (GCD).

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What is the ratio of 5 dogs to 9 cats?

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The ratio is 5:9.

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If there are 4 oranges and 8 total fruits, what is the part to whole ratio of oranges to fruits?

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The part to whole ratio is 4:8, which simplifies to 1:2.

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How do you express a ratio in different forms?

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A ratio can be expressed in three forms: as a fraction (5/9), with a colon (5:9), or with the word 'to' (5 to 9).

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CCSS.6.RP.A.1

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What is the ratio of red dots to total dots if there are 5 red dots and 6 total dots?

Back

The ratio is 5:6.

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In a classroom with 13 boys and 10 girls, what is the ratio of boys to girls?

Back

The ratio of boys to girls is 13:10.

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CCSS.6.RP.A.1

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If there are 3 seals and 8 total animals, what is the part to whole ratio of seals to animals?

Back

The part to whole ratio is 3:8.

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