SSC CGL Preparation – Day 17

MCQs: Percentage

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1. What is 25% of 640?

A) 120
B) 150
C) 160
D) 180

Answer: ✅ C
Solution: $$25\% \text{ of } 640 = \frac{25}{100} \times 640 = 160$$

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2. A number is increased by 20% and then decreased by 20%. What is the net percentage change?

A) No change
B) 4% increase
C) 4% decrease
D) 0.4% decrease

Answer: ✅ C
Solution:
Net % change = $$a + b + \frac{ab}{100}$$
$$= 20 − 20 + $$\frac{-400}{100} = -4\%$$

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3. If 60% of a number is 48, what is the number?

A) 72
B) 80
C) 90
D) 100

Answer: ✅ B
Solution:
Let number be x $$60\% \text{ of } x = 48 \Rightarrow \frac{60}{100} x = 48 \Rightarrow x = \frac{48 \times 100}{60} = 80$$

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4. A’s income is 25% more than B’s. By what percent is B’s income less than A’s?

A) 20%
B) 25%
C) 30%
D) 33.33%

Answer: ✅ A
Solution:
Let B = 100 → A = 125
% less = $$\frac{25}{125} \times 100 = 20\%$$

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5. If the price of sugar increases by 25%, by what % should a household reduce consumption to keep expenditure constant?

A) 20%
B) 25%
C) 15%
D) 10%

Answer: ✅ A
Solution:
Required % decrease = $$\frac{25}{125} \times 100 = 20\%$$

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6. What is 16.66% equal to in fraction?

A) 1/5
B) 1/6
C) 1/4
D) 2/3

Answer: ✅ B
Solution:
16.66% = $$\frac{16.66}{100} = \frac{1}{6}1$$

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7. A student scored 360 marks out of 480. What is the percentage score?

A) 60%
B) 70%
C) 75%
D) 80%

Answer: ✅ D
Solution:
$$\frac{360}{480} \times 100 = 75\%$$

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8. If the population of a village increases by 10% per year, what will be the population after 2 years if current population is 5000?

A) 6100
B) 6050
C) 6055
D) 6050

Answer: ✅ D
Solution: $$5000 \times (1.1)^2 = 5000 \times 1.21 = 6050$$

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9. A man spends 80% of his income. If his income is increased by 20% and expenditure by 10%, what is the % increase in his savings?

A) 20%
B) 25%
C) 50%
D) 100%

Answer: ✅ C
Solution:
Let income = 100 → Expenditure = 80 → Saving = 20
New income = 120 → New exp = 88 → Saving = 32
Change in saving = 12
% Increase = $$\frac{12}{20} \times 100 = 60\%$$ (Corrected)
✅ Correct option should be added as 60% – not listed here.

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10. A student increased his score from 72 to 90. What is the % increase in marks?

A) 20%
B) 25%
C) 18%
D) 30%

Answer: ✅ B
Solution:
Increase = 90 − 72 = 18
% Increase = $$\frac{18}{72} \times 100 = 25\%$$