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Using a Calculator to Find Percentages of Quantities

In this worksheet, students use a calculator to find percentages of quantities.

'Using a Calculator to Find Percentages of Quantities' worksheet

Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Use Calculators/Technology for Accuracy

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

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
 =  £ ________
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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.
  • 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.
  • 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.
  • 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.
  • 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!
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