Ratios and proportions

The ratio 5:15 simplifies to...

• 1:3
• 3:1
• 1:5
• 3:5

10 students want hotdogs for lunch and 26 want hamburgers.  What is the ratio of the number of students who want hot dogs to the number of students who want hamburgers?

• 26:10
• 10:26
• 10:36
• 25:36

There are 13 male teachers and 5 female teachers at Margo's School.  What is the ratio of female teachers to male teachers?

• 5:13
• 13:5
• 18:10
• 26:5

A bag contains marbles: 5 blue and 10 green. How many green marbles are there for every blue marble?

• 1
• 2
• 5
• 10

Find the missing number:
2 : 5 = ? : 20

• 8
• 10
• 25
• 6

Solve for the unknown in the equivalent ratios.
3/4 = 9/?

• 8
• 10
• 4
• 12

In my fish tank, the ratio of red fish to blue fish is 3:5. There are 20 blue fish. How many red fish are there?

• 18
• 12
• 4
• 15

There are 4 birds and 6 snakes. What is the ratio of birds to total animals?

• 4/10
• 4/6
• 6/4
• 10/4

You travel 150 miles on 5 gallons. How far did you travel per gallon?

• 15 miles
• 30 miles
• 3 miles
• 25 miles

You drive 25 miles in one hour. At this rate, how far will you drive in 3 hours?

• 25 miles
• 50 miles
• 125 miles
• 75 miles