100+ Percentage Questions and Answers for Competitive Exams - 1

Question: 1

270 candidates appeared for an examination, of which 252 passed. The pass percentage is

(A) 80%

(B) 90%

(C) $$93{1}/{3}$$

(D) $$94{1}/{2}$$

Ans: C

Pass percentage = $$({252} / {270} × 100)%$$ = $${280} / {3}%$$ = 93$${1} / {3}$$%.

Question: 2

5 kg of metal A and 20 kg of metal B are mixed to form an alloy. The percentage of metal A in the alloy is

(A) 10%

(B) 20%

(C) 30%

(D) 40%

Ans: B

Weight of metal A = 5 kg.

Total weight of the alloy = (5 + 20) kg = 25 kg.

Therefore, Required percentage = $$({5} / {25} × 100)$$% = 20%.

Question: 3

What is 25% of 25% equal to?

(A) 0.0625

(B) 0.00625

(C) 0.625

(D) 6.25

Ans: A

25% of 25% = $${25}/ {100} × {25} / {100}$$ = $${1} / {16}$$ = 0.0625.

Question: 4

If the price of a book is first decreased by 25% and then increased by 20%, then the net change in the price will be

(A) 5% increase

(B) 5% decrease

(C) 10% decrease

(D) 10% increase

Ans: C

Let the original price be Rs. 100.

New final price

= 120% of (75% of Rs. 100)

= Rs. $$({120} / {100} ×{ 75} / {100} × 100)$$ = Rs. 90.

∴ Decrease = 10%.

Question: 5

The ratio 5 : 4 expressed as a percent equals

(A) 12.5%

(B) 40%

(C) 80%

(D) 125%

Ans: A

5 : 4 = $${5} / {4}$$ = $$({5} / {4} × 100)$$% = 12.5%.

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