Comparing Proportions

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

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How do you compare two proportions?

Back

You can compare two proportions by cross-multiplying and checking if the products are equal.

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What does it mean if two proportions are equivalent?

Back

If two proportions are equivalent, it means they represent the same relationship between quantities.

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Front

What is the formula for finding a missing value in a proportion?

Back

The formula is a/b = c/d, where you can find the missing value by cross-multiplying.

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CCSS.7.RP.A.2C

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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Front

How can you express a ratio as a fraction?

Back

A ratio can be expressed as a fraction by placing the first quantity over the second quantity.

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Front

What is the relationship between ratios and proportions?

Back

Ratios are used to form proportions, which compare two ratios to see if they are equivalent.

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What is the significance of the term 'per hour' in comparing rates?

Back

'Per hour' indicates a rate of change, allowing for comparison of how much of something occurs in one hour.

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How do you calculate the difference between two rates?

Back

To calculate the difference, subtract the lower rate from the higher rate.

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Front

What does it mean to run faster by a certain amount per hour?

Back

It means the speed increase is measured in distance covered in one hour compared to another speed.

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CCSS.6.RP.A.3C