ratio basics and equivalent

Inside a classroom, for every 12 boys there are 8 girls. That ratio could be represented by:

• 10 : 8

• 20 : 12

• 6 : 4

• 4 : 3

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

What is a Ratio?

• Is 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

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

Fully simplify the ratio...

32:40

• 16:20

• 8:10

• 4:5

• 10:8

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

If a ratio is 2:3, how many parts are there in total?

• 2
• 3
• 4
• 5

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

2.  Write 3 to 9 as a ratio.

• 3:9
• 3^9
• 3 - 9
• 3 + 9

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Simplify 8:4

• 4:2
• 2:1
• 1:2
• 4:1

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Simplify 8:32

• 1:4
• 4:1
• 4:16
• 2:8

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CCSS.6.RP.A.3A

What number is missing?

• 12
• 3
• 11
• 13

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CCSS.3.OA.A.4

CCSS.3.OA.D.9

A backyard pond has 12 sunfish and 30 rainbow shiners. Write the ratio of sunfish to rainbow shiners in simplest form .

• 12:30

• 2:5

• 18:30

• 3:5

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CCSS.6.RP.A.1

CCSS.6.RP.A.2