Proportion

It is the comparison of two quantities by an indicated division.

• Ratio

• Decimal

• Fraction

• Proportion

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Ms. Jean’s class has 32 students, of which 20 are girls. What is the ratio of girls to boys?

• 3:5

• 5:3

• 2:5

• 5:2

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

A backyard pond has 12 sunfish and 30 goldfish. What is the ratio of sunfish to goldfish in its simplest form?

• 2:5

• 5:2

• 3:5

• 5:3

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

In the faculty, 10 of the faculty members are men and 15 of them were women. What is the ratio of men to women?

• 3:2

• 5:3

• 2:3

• 3:5

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

The length of a rectangular garden is 20ft and the width is 15feet. What is the ratio of length to width?

• 3:4

• 5:4

• 4:5

• 4:3

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

The ratio of the number of boys to the number of girls in the mathematics club is 4 to 5. If there are 25 girls in the club, how many boys are in the club?

Let x be the number of boys in the club. (Show yor solution)

• 15 boys

• 20 boys

• 25 boys

• 30 boys

Answer explanation

4:5 = _:25

multiply the extremes

(4)(25) = 100

The resulting number will be divided by the means, 5.

100 ÷ 5 = 20

20 boys

In a photograph, Jane is 9 cm tall, and her brother John is 10 cm tall. Jane’s actual height is 153 cm. What is John’s actual height? Let 𝑥 be the actual height of John in cm. (Show your solution)

• 150 cm

• 160 cm

• 170 cm

• 180 cm

Answer explanation

9:10 = 153:_

multiply the means

(10)(153) = 1530

the resulting number will be divided by the extremes 9

1530 ÷ 9 = 170

John's actual height is 170 cm

Tags

CCSS.6.RP.A.3B

Ms. Peters wants to prepare a party for 80 people. She has a chocolate cake recipe that makes 3 small cakes that can serve 16 people. How many cakes does she need to bake for her party?

Let 𝑥 be the number of cakes to be baked for the party. (Show your solution)

• 15

• 16

• 17

• 18

Tags

CCSS.7.EE.B.3

A map of a resort uses the scale of 2cm for every 100m. If the swimming pool is 250m away from the rooms. How far would the pool be from the rooms on the map? (Show your solution)

• 8 cm

• 7 cm

• 6 cm

• 5 cm

Answer explanation

cm:m

2:100 = _:250

multiply the extremes

(2)(250) = 500

divide the resulting number by means, 100

500 ÷ 100 = 5

5 meters

Tags

CCSS.7.RP.A.2C

The ratio of the numbers of letters used in two words is 5 to 3. If the first word contains 15 letters; how many letters are in the second word?

• 7 letters

• 8 letters

• 9 letters

• 10 letters