Setting Up Ratios

There are 12 boys and 13 girls in the school science club. What is the ratio of number of girls to number of boys?

• 13 : 12

• 12 : 13

• 25 : 13

• 13 : 25

Mr. Johnston paid a water and electricity utility bill of $65 last month. His water bill for that month was $27. What is the ratio of the payment for electricity to the payment for water?

• 38 to 27

• 38 to 65

• 27 to 38

• 27 to 65

There are 21 boys and 30 girls in the school band. Find the ratio for number of boys in the band to the total number of students in the band.

• 21 : 51

• 21 : 30

• 51 : 21

• 30 : 21

Find the equivalent ratio with lower terms.

24 : 20 = 12 : ___

• 10

• 6

• 25

• 12

In Mr. Isaacs's 5th grade class, 24 out of 28 students purchase lunch from the school cafeteria. How many students out of every 14 purchase their lunch?

Out of every 14 students, _____ purchased their lunch.

• 12

• 18

• 30

• 36

Use the multiplication table. Which of the ratios is not equivalent to 15 : 18?

• 10 : 14

• 5 : 6

• 20 : 24

• 30 : 36

A person working at a department store compared the number of Supreme shoes to the total number of shoes on display in the men’s, women’s, and children’s sections. The ratios for the three sections are equivalent. Complete the table.

• 20, 63

• 16, 81

• 24, 54

• 8, 18

A hedgehog uses 32 cups of lemon juice and 38 cups of sugar to make his famous lemonade. The lemon juice-to-sugar ratio is 32 : 38. How much sugar does the hedgehog need if he only uses 16 cups of lemon juice?

• 19

• 18

• 32

• 76

A teacher is writing a test. She wants the ratio of the number of easy questions to the total number of questions to be 21 : 24. If the teacher wants less than 21 easy questions on the test, how many easy questions should she write?

• 7

• 3

• 5

• 21

Are the ratios 30/45 and 14/27 equivalent?

• No

• Yes