Proportions, Rates, and Ratios AMS

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 for an unknown in a proportion?

Back

Cross-multiply the two ratios and then solve for the unknown.

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CCSS.7.RP.A.2C

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How can you express a ratio in simplest form?

Back

Divide both terms of the ratio by their greatest common divisor.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the difference between a rate and a ratio?

Back

A rate is a specific kind of ratio that compares two quantities with different units.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a recipe calls for 3 cups of sugar and 9 cups of water, what is the ratio of sugar to water?

Back

The ratio of sugar to water is 1:3.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you convert a percentage to a decimal?

Back

Divide the percentage by 100.

Front

If Gabby saves 40% of her paycheck and earns $270, how much does she save?

Back

Gabby saves $108.

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CCSS.6.RP.A.3C

Front

What is the formula to find a percentage of a number?

Back

Multiply the number by the percentage (in decimal form).

Front

How do you find the total number of items when given a ratio?

Back

Add the parts of the ratio together and then use the ratio to find the total.