Understanding Proportions in Math

Do the ratios form a proportion?
(reduce both, to their lowest form, are they the same)

• Yes, they form a proportion.

• No, they do not form a proportion.

Solve:

• 2

• 9

• 35

• 7

Do the ratios form a proportion?

• Yes, they form a proportion.

• No, they do not form a proportion.

Solve:

• 6

• 7

• -8

• -5

Solve for x 

• x = 6

• x = 25

• x = 28

• x = 17

Solve for x

• x = 19.6

• x = 5/98

• x = 101/5

If 3 pencils cost $6, how much do 5 pencils cost?

• $8

• $10

• $12

• $15

A recipe requires 2 cups of flour for every 3 cups of sugar. If you use 6 cups of sugar, how many cups of flour do you need?

• 3 cups

• 4 cups

• 5 cups

• 4 cups

The ratio of boys to girls in a class is 2:3. If there are 12 boys, how many girls are there?

• 15

• 18

• 20

• 24

• 6

• 8

• 12

• 16