Percentages - Free maths worksheets and other resources - Free Printable

Let's solve each part of the problem step by step. We'll calculate the required percentages of the given numbers.

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Step 1: Find 10% of the following amounts

To find 10% of a number, divide the number by 10 (since 10% = 1/10).

1. 10% of 30 = 30 ÷ 10 = 3
2. 10% of 90 = 90 ÷ 10 = 9
3. 10% of 60 = 60 ÷ 10 = 6
4. 10% of 20 = 20 ÷ 10 = 2
5. 10% of 100 = 100 ÷ 10 = 10
6. 10% of 70 = 70 ÷ 10 = 7

✔ Answers:
1. 3
2. 9
3. 6
4. 2
5. 10
6. 7

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Step 2: Find 20% of the following amounts

To find 20%, first find 10% and then double it (because 20% = 2 × 10%).

1. 20% of 30 = 2 × (10% of 30) = 2 × 3 = 6
2. 20% of 90 = 2 × 9 = 18
3. 20% of 60 = 2 × 6 = 12
4. 20% of 20 = 2 × 2 = 4
5. 20% of 100 = 2 × 10 = 20
6. 20% of 70 = 2 × 7 = 14

✔ Answers:
1. 6
2. 18
3. 12
4. 4
5. 20
6. 14

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Step 3: Find 30% of the following amounts

30% = 3 × 10%, so multiply 10% by 3.

1. 30% of 30 = 3 × 3 = 9
2. 30% of 90 = 3 × 9 = 27
3. 30% of 60 = 3 × 6 = 18
4. 30% of 20 = 3 × 2 = 6
5. 30% of 100 = 3 × 10 = 30
6. 30% of 70 = 3 × 7 = 21

✔ Answers:
1. 9
2. 27
3. 18
4. 6
5. 30
6. 21

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Step 4: Find 5% of the following amounts

5% = half of 10%, so divide 10% by 2.

1. 5% of 30 = 3 ÷ 2 = 1.5
2. 5% of 90 = 9 ÷ 2 = 4.5
3. 5% of 60 = 6 ÷ 2 = 3
4. 5% of 20 = 2 ÷ 2 = 1
5. 5% of 100 = 10 ÷ 2 = 5
6. 5% of 70 = 7 ÷ 2 = 3.5

✔ Answers:
1. 1.5
2. 4.5
3. 3
4. 1
5. 5
6. 3.5

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Step 5: Find 15% of the following amounts

15% = 10% + 5%, so add the 10% and 5% values.

1. 15% of 30 = 3 + 1.5 = 4.5
2. 15% of 90 = 9 + 4.5 = 13.5
3. 15% of 60 = 6 + 3 = 9
4. 15% of 20 = 2 + 1 = 3
5. 15% of 100 = 10 + 5 = 15
6. 15% of 70 = 7 + 3.5 = 10.5

✔ Answers:
1. 4.5
2. 13.5
3. 9
4. 3
5. 15
6. 10.5

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✔ Final Answer Summary:

#### 10%
1. 3
2. 9
3. 6
4. 2
5. 10
6. 7

#### 20%
1. 6
2. 18
3. 12
4. 4
5. 20
6. 14

#### 30%
1. 9
2. 27
3. 18
4. 6
5. 30
6. 21

#### 5%
1. 1.5
2. 4.5
3. 3
4. 1
5. 5
6. 3.5

#### 15%
1. 4.5
2. 13.5
3. 9
4. 3
5. 15
6. 10.5

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🔍 Key Tips:

- 10%: Divide by 10.
- 20%: Double the 10% value.
- 30%: Triple the 10% value.
- 5%: Half of 10%.
- 15%: Add 10% and 5%.

This method helps you find percentages quickly without using a calculator! 🎯