Percentages of Amounts (B) Free Worksheet | Printable PDF Worksheets - Free Printable

Let’s work through each problem one by one. The idea is to break the percentage into parts (like 50% + 10%, or 25% - 10%), calculate those parts of the number, and then add or subtract them as instructed.

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Problem 1: Find 60% of 100

We’re told to use 50% and 10%, then ADD.

- 50% of 100 = 50
- 10% of 100 = 10
- Add them: 50 + 10 = 60

✔ Final Answer for #1: 60

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Problem 2: Find 75% of 12

Use 50% and 25%, then ADD.

- 50% of 12 = 6
- 25% of 12 = half of 50%, so half of 6 = 3
- Add them: 6 + 3 = 9

✔ Final Answer for #2: 9

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Problem 3: Find 35% of 20

Use 25% and 10%, then ADD.

- 25% of 20 = half of 50%. First, 50% of 20 = 10 → so 25% = 5
- 10% of 20 = 2
- Add them: 5 + 2 = 7

✔ Final Answer for #3: 7

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Problem 4: Find 40% of 80

Use 50% and 10%, then TAKE AWAY.

- 50% of 80 = 40
- 10% of 80 = 8
- Take away: 40 - 8 = 32

✔ Final Answer for #4: 32

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Problem 5: Find 15% of 40

The arrow is blank — but looking at the parts: 25% and 10%. Since 25% - 10% = 15%, we should TAKE AWAY.

- 25% of 40 = half of 50%. 50% of 40 = 20 → so 25% = 10
- 10% of 40 = 4
- Take away: 10 - 4 = 6

✔ Final Answer for #5: 6

*(Note: You could also do 10% + 5%, but since the worksheet gives 25% and 10%, subtraction makes sense here.)*

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Problem 6: Find 20% of 50

Parts are 10% and 10%. So we ADD.

- 10% of 50 = 5
- Another 10% = 5
- Add: 5 + 5 = 10

✔ Final Answer for #6: 10

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Problem 7: Find 40% of 30

Parts: 50% and 10%. Operation: TAKE AWAY → because 50% - 10% = 40%

- 50% of 30 = 15
- 10% of 30 = 3
- Take away: 15 - 3 = 12

✔ Final Answer for #7: 12

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Problem 8: Find 15% of 16

Parts: 25% and 10%. Operation: TAKE AWAY → because 25% - 10% = 15%

- 25% of 16 = half of 50%. 50% of 16 = 8 → so 25% = 4
- 10% of 16 = 1.6
- Take away: 4 - 1.6 = 2.4

✔ Final Answer for #8: 2.4

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Final Answers:

1) 60
2) 9
3) 7
4) 32
5) 6
6) 10
7) 12
8) 2.4