Proportions Review

Front

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 write a ratio?

Back

Ratios can be written in three ways: using the word 'to' (e.g., 2 to 3), using a colon (e.g., 2:3), or as a fraction (e.g., 2/3).

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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

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and set the products equal to each other.

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CCSS.7.RP.A.2C

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity of one.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a car travels 120 miles in 2 hours, what is its speed in miles per hour?

Back

60 miles per hour.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the formula for finding the unit price?

Back

Unit price = Total price / Number of units.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If you buy 15 oranges for $3.00, what is the cost of one orange?

Back

$0.20 per orange.

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CCSS.6.RP.A.1

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Front

What is the ratio of boys to girls if there are 10 boys and 15 girls?

Back

The ratio of boys to girls is 2 to 3.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you find equivalent ratios?

Back

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

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CCSS.6.RP.A.3A