Ratios

We have 13 boys in math and 9 girls. What is the ratio boys: girls?

• 9 to 13

• 13 to 23

• 9:23

• 13:9

In our math class 8 students wear glasses and 14 do not. What is the ratio of glasses to students in class?

• 8:14

• 22 to 8

• 8 to 22

• 14 : 8

We took a survey of pets in the class. 10 students have a pet and 12 students have no pets. What is the ratio of students with no pet to students with a pet?

• 10: 12

• 12: 22

• 12 to 10

• 10 to 12

We took a survey of our class. 15 students bring lunch from home and 8 students buy lunch. What is the ratio of the class to student who buy lunch?

• 15 to 23

• 23 to 15

• 8 to 23

• 23 to 8

Yesterday, 20 students completed their science food web and 4 students did not.

What is the ratio of students who completed their food web: the whole class.

• 20:4

• 20:24

• 24: 4

• 4: 20