Ratios and Equivalent Ratios

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What is a ratio?

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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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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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What are equivalent ratios?

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Equivalent ratios are ratios that express the same relationship between two quantities, even if the numbers are different.

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CCSS.6.RP.A.3A

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How do you determine if two ratios are equivalent?

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Two ratios are equivalent if you can simplify them to the same fraction or if you can cross-multiply and get the same product.

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CCSS.6.RP.A.3A

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What is the ratio of 3 apples to 6 oranges?

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1 to 2.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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If the ratio of boys to girls in a class is 2:3, how many boys are there if there are 15 girls?

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10 boys.

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What is the ratio of STARS to SQUARES if there are 3 STARS and 4 SQUARES?

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3 to 4.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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If 1:2 is an equivalent ratio to 2:4, what is the relationship between these ratios?

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They are equivalent ratios.

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CCSS.6.RP.A.3A

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What is the value of A if the ratio of A to 15 is equivalent to the ratio of 3 to 5?

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A = 9.

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CCSS.6.RP.A.3A

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How can you express the ratio of 10 to 25 in simplest form?

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2 to 5.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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If a recipe calls for 2 cups of flour for every 3 cups of sugar, what is the ratio of flour to sugar?

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2 to 3.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2