Ratios

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What is a ratio?

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A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a to b' or a fraction a/b.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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How do you simplify a ratio?

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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

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What is the ratio of birds to total animals if there are 4 birds and 6 snakes?

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4/10 or 2/5.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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If the ratio of tenants to cars is 3:5 and there are 30 tenants, how many cars are there?

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50 cars.

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What is the ratio of red toy cars to all toy cars if Patrick has 2 black, 3 red, and 5 white toy cars?

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3:10.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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How do you express a ratio in fraction form?

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A ratio can be expressed in fraction form by placing the first quantity over the second quantity.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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What is a part-to-part ratio?

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A part-to-part ratio compares different parts of a whole, such as the ratio of boys to girls in a class.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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What is a part-to-whole ratio?

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A part-to-whole ratio compares a part of a quantity to the entire quantity, such as the ratio of red marbles to all marbles.

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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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2:3.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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How can ratios be used in real life?

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Ratios can be used in cooking, budgeting, and comparing quantities in various situations.