Ratios and Proportions Review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, often expressed as 'a to b' or 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

Front

How do you determine if two ratios are proportional?

Back

Two ratios are proportional if their cross products are equal.

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CCSS.7.RP.A.2A

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 per one unit of another quantity.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you calculate the unit rate from a given rate?

Back

To find the unit rate, divide the first quantity by the second quantity.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What does 150% of x equal to 90% of y imply?

Back

It implies that 1.5x = 0.9y, which can be rearranged to find the relationship between x and y.

Front

If a clothing item is discounted by 25%, what is the sale price?

Back

The sale price is 75% of the original price, calculated as p - 0.25p = 0.75p.

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CCSS.6.RP.A.3C

Front

What is the equivalent of a 25% discount on an item?

Back

A 25% discount means you pay 75% of the original price.

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CCSS.6.RP.A.3C

Front

How do you convert a speed given in feet per minute to miles per hour?

Back

To convert feet per minute to miles per hour, multiply by 60 and divide by 5280.

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CCSS.6.RP.A.3B

Front

What is the fastest speed among given options?

Back

To find the fastest speed, convert all speeds to the same unit and compare.