Ratios, Proportions, Decimals, Percent 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.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you determine if two ratios are equivalent?

Back

Two ratios are equivalent if they simplify to the same fraction or if their cross products are equal.

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CCSS.6.RP.A.3A

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 convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator by the denominator.

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CCSS.7.NS.A.2D

CCSS.8.NS.A.1

Front

What is 30% of 60?

Back

18

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CCSS.6.RP.A.3C

Front

How do you find the percent of a number?

Back

To find the percent of a number, multiply the number by the percent (as a decimal). For example, to find 20% of 80, calculate 80 * 0.20.

Tags

CCSS.6.RP.A.3C

Front

What is the better buy: 12 cans for $3.50 or 6 cans for $1.80?

Back

12 cans for $3.50 is the better buy.

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CCSS.6.RP.A.3B

Front

What is the formula to calculate a percentage?

Back

Percentage = (Part/Whole) * 100.

Front

How do you compare two prices to find the better deal?

Back

Calculate the unit price for each option (price per item) and compare them.

Tags

CCSS.6.RP.A.3B

Front

What is 20% of 80?

Back

16

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CCSS.6.RP.A.3C