Comparisons & Predictions 6.4B

The ratio of boys to girls in the school choir is 4:7. If there are 16 boys, how many girls are in the choir?

(Set up your proportion)

c

d

b

e

a

girls

16

7

4

g

The ratio of boys to girls in the school choir is 4:7. If there are 16 boys, how many girls are in the choir?

• 19

• 28

• 27

• 32

The school cafeteria sells 22 drinks every 10 minutes. Predict how many drinks the cafeteria will sell during the 45-minute lunch period.

(Set up proportion)

b

c

d

e

a

10

d

45

22

drinks

The school cafeteria sells 22 drinks every 10 minutes. Predict how many drinks the cafeteria will sell during the 45-minute lunch period.

• 109

• 99

• 89

• 120

The ratio of the length of a rectangle to the width of the the rectangle is 5:7. Which of the following could be the length and the width of the rectangle?

Hint: Try a ratio table...

• length: 15 units

  width: 20 units

• length: 10 units

  width: 15 units

• length: 20 units

  width: 22.5 units

• length: 22.5 units

  width: 31.5 units

Which is the better buy?

Hint: Find the unit rate...

• 10 apples for $1.50

• 4 apples for $0.56

Which is the better buy?

Hint: Find the unit rate...

• 9 apples for $1.44

• 6 apples for $0.90

Tags

6.4B

Which is the better buy?

• 9 apples for $1.44

• 6 apples for $0.90

• 4 apples for $0.56

• 10 apples for $1.50

Which of the following has the greatest miles to gallons of gasoline ratio?

• 120 miles 0n 8 gallons

• 216 miles on 12 gallons