Ratios, Rates, and Percents

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division. It shows 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 simplify a ratio?

Back

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

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two quantities with different units, such as speed (miles per hour) or price per item.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part per hundred.

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How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and then multiply by 100.

Front

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

Back

The formula is: Percentage = (Part/Whole) x 100.

Front

If a recipe calls for a ratio of 2:3 of flour to sugar, how much sugar is needed for 4 cups of flour?

Back

To find the amount of sugar needed, set up the ratio: 2/3 = 4/x. Cross-multiply to find x, which equals 6 cups of sugar.

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How do you find the unit price?

Back

To find the unit price, divide the total price by the number of units.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the unit price if 6 pens cost $2.34?

Back

The unit price is $0.39 per pen, calculated as $2.34 ÷ 6.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How many ounces are in 11 pounds?

Back

There are 176 ounces in 11 pounds, calculated as 11 x 16.

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CCSS.4.MD.A.1