Ratio and Proportion

In a class there are 30 boys and 12 girls. Find the ratio of number of boys to number of girls.

• 2 : 5

• 5 : 2

• 3 : 4

• None of the above

A bag of marbles comes with 3 blue marbles, 2 red marbles, and 5 yellow marbles. What is the ratio of red to yellow?

• 2 to 5

• 5 to 3

• 3 to 5

• 5 to 2

Express 45 to 90 in its lowest term.

• 3 : 4

• 2 : 3

• 1 : 2

• 5 : 9

A class has 30 students. 18 are boys. What is the ratio of boys to girls?

• 12:18

• 3:2

• 30:18

• 18:7

The pet shop has 2 dogs, 4 cats, and 5 hamsters. What is the ratio of dogs to all pets?

• 2:4

• 2:5

• 2:11

• 11:2

Answer should be in simplest form.

4 boys to 10 girls

• 5:2

• 2:5

• 4:5

Answer should be in simplest form.

10 eggs to 20 breads

• 1:2

• 10:20

• 2:1

Answer should be in simplest form.

3 ribbons to 13 ties

• 3:13

• 13:3

• 3:3

2:3 = 4:6

• Proportion

• Not Proportion

Type the missing number.

4:2 = N:1