Ratio and Proportion

Which is the better deal?
Doritos
£4.20 for 10kg
OR
Cheetos
£4.80 for 12kg

• Doritos

• Cheetos

Which of these ratios is equivalent to 3:4?

• 12:9

• 9:20

• 9:12

• 803:804

• 1
• 3
• 12
• 2

Solve the proportion.

• q=2

• q=9

• q=4.5

• q=6

In a survey, the ratio of people who prefer tea to those who prefer coffee is 3:2. If 120 people were surveyed, how many prefer tea?

• 48

• 72

• 80

• 90

What is the equivalent ratio of 4:6 when simplified?

• 2:3

• 1:2

• 3:4

• 6:9

A recipe calls for 2 cups of flour for every 3 cups of sugar. Which of the following is the correct ratio of flour to sugar?

• 2:3

• 3:2

• 1:1.5

• 1.5:1

What is 20% of a number if 25% of the same number is 15?

• 10

• 12

• 14

• 16

A bag contains red and blue marbles in the ratio 3:4. If there are 21 red marbles, how many blue marbles are there?

• 16

• 24

• 28

• 32

A school's student to teacher ratio is 20:1. If there are 400 students, how many teachers are there?

• 10

• 20

• 40

• 80