Ratios and Proportions I

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

If there are 5 boys and 7 girls, write the ratio of girls to boys.

• 5 to 7
• 7 to 5
• 5 to 12
• 7 to 12

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

The pet shop has 2 dogs, 4 cats, and 5 hamsters. What is the ratio of dogs to all pets?

• 2:4
• 2:5
• 2:11
• 11:2

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Solve the proportion.

• n=6
• n=24
• n=7
• n=8

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CCSS.7.RP.A.2B

In a certain apartment building, the ratio of tenants to cars is 3:5. If there are 30 tenants, how many cars are there?

• 35
• 60
• 18
• 50

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

CCSS.6.RP.A.3

What is the ratio to the picture shown, triangles to squares?

• 2:6
• 5:6
• 3:4
• 4:3

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

In an animal shelter, the ratio of dogs to cats is 5 to 3. There are 25 dogs. Use your knowledge of equivalent ratios to find the number of cats.

• c=15

• c=18

• c=21

• c=16

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

CCSS.6.RP.A.3

Write the ratio as a fraction in simplest form. 
 
 24 players : 3 teams

• 8:3
• 8 to 1
• 8/1
• 8/3

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Write the ratio as a fraction in simplest form (reduce the fraction). 15 girls to 6 boys

• 5 to 2

• 5/3

• 3 to 5

• 5/2

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

These are equivalent ratios. What is the value of k?

• k=5

• k=3.3333333

• k=60

• k=90

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CCSS.6.EE.B.5

CCSS.6.EE.B.6

CCSS.6.EE.B.7

CCSS.6.RP.A.1

CCSS.6.RP.A.2

CCSS.6.RP.A.3