Ratios, Rates & Proportions

What is a Ratio?

• Is a comparison of two quantities 
• A rate with a denominator of one
• It is when the only factor the numerator and denominator share is a one 
• Two decimals that can be multiplied

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What word can be used when writing a ratio?

• a
• be
• to
• and

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What is the ratio of red apples to green apples

• 7 apples to 3 green
• 4 red apples to 7 apples
• 4 red apples to 3 green apples
• 3 green apples to 4 red apples

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There are 15 boys out of 23 students.  What kind of ratio is this?

• part to part
• part to whole

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The ratio of boys to girls in one class is 15:12.
What kind of ratio is this?

• part to part
• part to whole

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Tommy has a bag of LEGOS.  There are 6 yellow, 3 red, and 8 blue LEGOS.  What is the ratio in simplest form of red to yellow LEGOS?

• 1/2
• 6/3
• 2/1
• 3/6

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CCSS.6.RP.A.2

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Kelly has 10 apps on her iPad.
5 are school apps, 2 are music apps, and 3 are games.
What is the ratio of school apps to game apps?

• 5 to 2
• 3 to 5
• 5 to 10
• 5 to 3

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CCSS.6.RP.A.2

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There are 10 dimes, 8 quarters, and 5 nickels?  What is the ratio of quarters to dimes?

• 10 to 8
• 8 : 10
• 4 : 5
• 5 to 4

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CCSS.6.RP.A.1

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There are 4 triangles, 12 squares, and 6 circles.  What is the ratio of triangles to squares? Simplify.

• 12 : 4
• 2 to 6
• 1 : 3

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Your brother has a bag of marbles.  He has 8 green marbles, 3 blue marbles, 7 red marbles, and 2 yellow marbles. What is the ratio of blue marbles to green and red marbles?

• 1 to 3
• 1 : 5
• 2 to 3
• 2 : 7

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CCSS.6.RP.A.2

CCSS.6.RP.A.1