Ratios

Ratio Basics

100

 A ratio compares two numbers. Which is a correct way to write a ratio?

• A: 3 to 5
• B: 3 x 5

• A: 3 to 5

200

What is the ratio of 4 apples to 8 oranges?

• A: 8:4
• B: 4:8

• B: 4:8

300

Which of these is NOT a way to write the ratio 5 to 7?

• A: 5:7
• B: 7 to 5

• B: 7 to 5

400

A recipe calls for 2 cups of flour and 3 cups of sugar. What is the ratio of sugar to flour?

• A: 2:3
• B: 3:2

• B: 3:2

Finding Equivalent Ratios

100

What is an equivalent ratio to 2:3?

• A: 4:6
• B: 3:5

• A: 4:6

200

What is an equivalent ratio to 8:10?

• A: 16:20
• B: 12:15

• A: 16:20

300

If 7:4 is equivalent to 14:x, what is the missing number?

• A: 8
• B: 10

• A: 8

400

If 3:5 is equivalent to x:15, what is the missing number?

• A: 10
• B: 9

• B: 9

Challenge Problems

100

The ratio of cats to dogs in a shelter is 5:3. If there are 20 cats, how many dogs are there?

• A: 12
• B: 15

• A: 12

200

The ratio of boys to girls in a school is 4:5. If there are 180 girls, how many boys are there?

• A: 144
• B: 160

• A: 144

300

A car rental company has 18 SUVs for every 6 sedans in their fleet. If they have 36 SUVs, how many sedans should they have to maintain the same ratio?

• A) 12 sedans
• B) 14 sedans

• A) 12 sedans

400

A school has a ratio of 5 teachers to every 120 students. If there are 300 students, how many teachers should there be to keep the same ratio?

• A) 12 teachers
• B) 15 teachers

• B) 15 teachers