Solving Problems Involving Ratios

Kaya and Kiko share their electricity bills in the ratio 4:3. In January Akiko pays $18. What is their total bill?

• $31.50

• $10.29

• $24

• $42

Nina makes some green paint.

She mixes yellow, blue, and white in the ratio 4:5:1.

She uses 750 ml of blue paint.

How much green paint does he make?

• 150 ml

• 1.5 l

• 1350 ml

• 1500 l

How many grams of blackcurrants are there in the conserve?

• 214 g

• 120 g

• 1050 g

• 750 g

How much fruit is there altogether in the conserve?

• 750 g

• 1000 g

• 1050 g

• 420 g

5/9 of a piece of metal has a mass 8.5 kg. What is the mass of 4/7 of the piece of metal?

• 8.8 kg

• 8.7 kg

• 8.6 kg

• 8.5 kg

The ratio of boys to girls in history class is 4 to 5. How many girls are in the class if there are 12 boys in the class?

• 10

• 15

• 51

• 20

If Theresa has 5 quarters and Jason has 7 quarters, what is the ratio of the number of Jason's quarters to the number of Theresa's quarters?

• 7 to 5

• 5 to 7

• 7 to 12

• 12 to 7

If there are 24,000 maned wolves, how many dholes are there?  Use the tape diagrams to solve.

• 240

• 2400

• 2640

• 24,240

The ratio of brownies to cookies is 3:5.  If there are 75 cookies, how many brownies are there?

• 15

• 32

• 45

• 60

In a bag of Jolly Ranchers, the ratio of blue to red is 3 to 4. If I have a 15 blue jolly ranchers, how many are represented in the entire tape diagram?

• 20

• 105

• 7

• 35