Ratio and proportion

What is a ratio?

1. AA way of comparing two or more numbers
2. BA way of adding two numbers
3. CA number with a decimal point
4. DThe total of two numbers

Write 3:12 in its simplest form.

1. A1:4
2. B1:3
3. C3:4
4. D1:9

Write 12:9 in its simplest form.

1. A4:3
2. B3:4
3. C12:9
4. D6:3

Write 15:300 in its simplest form.

1. A1:20
2. B1:15
3. C3:60
4. D1:2

Complete the equivalent ratio: 5:7 = ?:21. What is the missing number?

12:16 is equivalent to 2:3.

Which ratio is equivalent to 3:4?

1. A24:32
2. B6:9
3. C20:25
4. D9:16

In a survey the ratio of apples to bananas was 3:5. 45 people preferred bananas and 27 preferred apples. How many people took part in the survey altogether?

The ratio of girls to boys is 3:2. There are 42 girls. How many boys are there?

Igor and Ollie share 24 counters in the ratio 3:5, and Igor gets the 3 parts. How many counters does Igor get?

6:3 and 2:1 are equivalent ratios.

Write 3:12 in its simplest form as 1:? Give the second number.

The ratio of people who preferred tea to coffee was 3:5. 27 people preferred tea. How many preferred coffee?

1. A45
2. B9
3. C15
4. D72

There are 7 cats for every 1 dogs. What is the ratio of cats to dogs?

1. A7 : 1
2. B7 : 8
3. C1 : 7

There are 7 red for every 1 blue. What is the ratio of red to blue?

1. A1 : 7
2. B7 : 8
3. C7 : 1

There are 6 apples for every 2 oranges. What is the ratio of apples to oranges?

1. A6 : 2
2. B6 : 8
3. C2 : 6

There are 9 cats for every 4 dogs. What is the ratio of cats to dogs?

1. A9 : 13
2. B9 : 4
3. C4 : 9

There are 5 red for every 8 blue. What is the ratio of red to blue?

1. A5 : 8
2. B8 : 5
3. C5 : 13

There are 7 apples for every 2 oranges. What is the ratio of apples to oranges?

1. A2 : 7
2. B7 : 2
3. C7 : 9

There are 4 circles for every 2 squares. What is the ratio of circles to squares?

1. A4 : 2
2. B2 : 4
3. C4 : 6