Ratios and Proportions

What is a Ratio?

• A comparison of two quantities 
• To multiply two fractions 
• A number over another number
• Two decimals that can be multiplied

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Write a ratio in simplest form:
10 automobiles to 13 bikes

• 1/3
• 10/13
• 4/5
• 3/1

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Is this proportion equal?
2/7     24/86

• =
• ≠

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CCSS.7.RP.A.2A

Is this proportion equal?
1/3     4/12

• =
• ≠

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CCSS.7.RP.A.2A

Is this proportion equal?
4/5  20/25

• =
• ≠

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CCSS.7.RP.A.2A

Solve:
7/n  =  14/10

• 5
• 7
• 70
• 4

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CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Solve:
11/13  =  n/39

• 33
• 3
• 25
• 9

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CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Ella has 5 balloons. Taylor has 7 balloons. Write the ratio of Ella's balloons to Taylor's balloons.

• 7:5
• 5:7
• 3:5
• 5:3

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

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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CCSS.6.RP.A.1

CCSS.6.RP.A.2

• 3
• 5.3
• 1.08
• 27

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CCSS.7.RP.A.2B