Using a Calculator to Find Percentages of Quantities Worksheet

In this worksheet, we will learn how to use a calculator to find percentages of quantities.

Example

Find 62

1

2

% of £732.

On your calculator work out

732 ÷ 100 x 62.5 = 457.5 = £457.50

Remember, when you work out 732 ÷ 100, you are finding 1% of the number.

Use a calculator to work out:

134

1

2

% of 168 km

= ________ km

Use a calculator to work out:

28

1

2

% of 920 km

= ________ km

Use a calculator to work out:

5

1

2

% of 246 km

= ________ km

Use a calculator to work out:

17

1

2

% of 862 g

= ________ g

Use a calculator to work out:

63

1

2

% of 540 g

= ________ g

Use a calculator to work out:

50

1

2

% of £240

= £ ________

Use a calculator to work out:

27

1

2

% of £588

= £ ________

Use a calculator to work out:

7

1

2

% of £101

= £ ________

(Round your answer off to the nearest penny)

Use a calculator to work out:

55

1

2

% of £240

= £ ________

Use a calculator to work out:

97

1

2

% of £588

= £ ________

ANSWERS

Question 1

Use a calculator to work out:

134

1

2

% of 168 km

= ________ km

CORRECT ANSWER

EDDIE SAYS

How did you do? Remember if you are struggling you can always flick back to the introduction. Remember first we have to find what 1% of 168km is. 168 ÷ 100 = 1.68 After this we complete the following sum: 1.68 x 134.5 = 225.96

ANSWERS

Question 2

Use a calculator to work out:

28

1

2

% of 920 km

= ________ km

CORRECT ANSWER

EDDIE SAYS

This question requires the same process. Remember if you are struggling you can always flick back to the introduction to check your method. First, we have to find what 1% of 920 km is. 920 ÷ 100 = 9.20 After this we complete the following sum: 9.28 x 28.5 = 262.20

ANSWERS

Question 3

Use a calculator to work out:

5

1

2

% of 246 km

= ________ km

CORRECT ANSWER

EDDIE SAYS

Are you getting used to this process now? Remember first we have to find what 1% of 246 km is. 246 ÷ 100 = 2.46 After this we complete the following sum: 2.46 x 5.5 = 13.53

ANSWERS

Question 4

Use a calculator to work out:

17

1

2

% of 862 g

= ________ g

CORRECT ANSWER

EDDIE SAYS

Are you getting used to this process now? Remember first we have to find what 1% of 862 g is. 862 ÷ 100 = 8.62 After this we complete the following sum: 8.62 x 17.5 = 150.85

ANSWERS

Question 5

Use a calculator to work out:

63

1

2

% of 540 g

= ________ g

CORRECT ANSWER

EDDIE SAYS

Hopefully, this is becoming second nature, but don't worry if you are still finding it a bit tricky, that's why we're practising it! Step 1, we have to find what 1% of 540 g is. 540 ÷ 100 = 5.4 After this we complete the following sum to find the percentage: 5.4 x 63.5 = 342.9

ANSWERS

Question 6

Use a calculator to work out:

50

1

2

% of £240

= £ ________

CORRECT ANSWER

EDDIE SAYS

This time it's a percentage of money, but even though the units have changed, it doesn't change our process! First, let's find 1% of £240 240 ÷ 100 = 2.4 Then we multiply this answer by the percentage we want to find: 2.4 x 50.5 = 121.2 Think back to the context of the question, it's about money. We, therefore, need to change the format of this to £121.20 as this makes sense in monetary value. You must always think about the units when completing these types of questions.

ANSWERS

Question 7

Use a calculator to work out:

27

1

2

% of £588

= £ ________

CORRECT ANSWER

EDDIE SAYS

It's another money based question... here we go! First, let's find 1% of £588 588 ÷ 100 = 5.88 Then we multiply this answer by the percentage we want to find: 5.88 x 27.5 = 161.7 Again, don't get caught out. This question is about money. Does the answer £161.7 make sense to you? Of course, it doesn't! We would write this as £161.70, so make sure you do that with this question or you will be marked incorrectly.

ANSWERS

Question 8

Use a calculator to work out:

7

1

2

% of £101

= £ ________

(Round your answer off to the nearest penny)

CORRECT ANSWER

EDDIE SAYS

It's another money based question... here we go! First, let's find 1% of £101 101 ÷ 100 = 1.01 Then we multiply this answer by the percentage we want to find: 1.01 x 7.5 = 7.575 If you looked at the question, it asks us to round this off to the nearest penny. So, our answer is £7.58. If you did not do this you would be marked as incorrect. Always make sure you read the whole question.

ANSWERS

Question 9

Use a calculator to work out:

55

1

2

% of £240

= £ ________

CORRECT ANSWER

133.20

EDDIE SAYS

How are you finding these money based questions? Are they getting easier throughout the activity? First, let's find 1% of £240 240 ÷ 100 = 2.4 Then we multiply this answer by the percentage we want to find: 2.4 x 55.5 = 133.2 Remember we have to change this to £133.20 to make it make sense as money! £133.2 does not work in this context.

ANSWERS

Question 10

Use a calculator to work out:

97

1

2

% of £588

= £ ________

CORRECT ANSWER

EDDIE SAYS

Last question coming up! You know the drill, let's find 1% of £588 588 ÷ 100 = 5.88 Then we multiply this answer by the percentage we want to find: 5.88 x 97.5 = 573.3 Remember we have to change this to £573.30 to make it make sense as money!