Let’s solve each problem step by step. Remember: to find a percentage of a number, you can turn the percent into a decimal and multiply — or use fractions if it’s easier (like 10% = 1/10).
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1. 10% of 50
10% means 10 out of 100 → that’s the same as 1/10.
So, 1/10 of 50 = 50 ÷ 10 =
5
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2. 10% of 180
Again, 10% = 1/10
180 ÷ 10 =
18
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3. 20% of 120
20% = 20/100 = 1/5
So, 120 ÷ 5 =
24
*(Or: 10% of 120 is 12, so 20% is 12 + 12 = 24)*
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4. 30% of 60
30% = 30/100 = 3/10
So, 60 × 3/10 = (60 ÷ 10) × 3 = 6 × 3 =
18
*(Or: 10% of 60 is 6, so 30% is 6 × 3 = 18)*
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5. 5% of 80
5% is half of 10%.
10% of 80 = 8 → so 5% = 8 ÷ 2 =
4
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6. 5% of £160
Same idea: 10% of 160 = 16 → so 5% = 16 ÷ 2 =
£8
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7. 15% of 80
Break it down: 15% = 10% + 5%
10% of 80 = 8
5% of 80 = 4
So, 8 + 4 =
12
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8. 15% of £160
Again: 10% + 5%
10% of 160 = 16
5% of 160 = 8
16 + 8 =
£24
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9. 35% of 200
Break it down: 35% = 30% + 5%
OR even better: 35% = 35/100 = 7/20
But let’s do 10% method:
10% of 200 = 20
So 30% = 20 × 3 = 60
5% = half of 10% = 10
So 60 + 10 =
70
*(Alternatively: 35% of 200 = 0.35 × 200 = 70 — also works!)*
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10. 65% of 500
Break it down: 65% = 60% + 5%
10% of 500 = 50
So 60% = 50 × 6 = 300
5% = half of 10% = 25
So 300 + 25 =
325
*(Check: 65% of 500 = 0.65 × 500 = 325 — correct!)*
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Final Answer:
1. 5
2. 18
3. 24
4. 18
5. 4
6. £8
7. 12
8. £24
9. 70
10. 325
Parent Tip: Review the logic above to help your child master the concept of percentage of a whole number worksheet.
