Percentage

J&K Bank PO · Quantitative Aptitude · 96 practice questions with answers and explanations: 49 Easy, 44 Medium, 3 Hard.

Sample questions

Sample Easy question 1

A student scored 45 out of 60. Find the percentage.

  1. 75%
  2. 70%
  3. 80%
  4. 72%
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Answer: A. (45/60) × 100 = 75%.

Sample Easy question 2

A student scored 18 out of 25. Find the percentage.

  1. 68%
  2. 72%
  3. 70%
  4. 75%
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Answer: B. (18/25) × 100 = 72%.

Sample Easy question 3

What is 120% of 50?

  1. 60
  2. 62
  3. 58
  4. 55
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Answer: A. 120% of 50 = 60.

Sample Medium question 4

Ravi's salary was first increased by 10% and then decreased by 10%. Find the net percentage change.

  1. +1%
  2. -1%
  3. 0%
  4. -2%
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Answer: B. Net factor = 1.1 × 0.9 = 0.99, i.e. a 1% decrease.

Sample Medium question 5

An alloy contains 25% copper and the rest zinc. If the alloy weighs 80 kg, find the weight of zinc.

  1. 62
  2. 58
  3. 55
  4. 60
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Answer: D. Zinc = 75% of 80 = 60 kg.

Sample Medium question 6

In an exam, 70% of students passed in English and 65% passed in Math, while 20% failed in both. Find the percentage who passed in both subjects.

  1. 55%
  2. 50%
  3. 52%
  4. 58%
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Answer: A. Pass in at least one = 80%. Pass in both = 70+65-80 = 55%.

Sample Hard question 7

72% of candidates passed in Physics and 68% passed in Chemistry, while 8% failed in both. If 240 candidates passed in both, find the total number of candidates.

  1. 500
  2. 480
  3. 510
  4. 490
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Answer: A. Pass in at least one = 92%. Pass in both% = 72+68-92 = 48%. 48% of total = 240, so total = 500.

Sample Hard question 8

In an election with two candidates, 10% of the votes were declared invalid. The winning candidate got 60% of the valid votes and won by 9,720 votes. Find the total number of votes polled.

  1. 48,000
  2. 44,000
  3. 40,000
  4. 54,000
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Answer: D. Valid votes = 90% of total. Winner's margin = 20% of valid votes = 9720, so valid votes = 48,600. Total votes = 48,600/0.9 = 54,000.

Sample Hard question 9

A trader increases the marked price of goods by 40% above cost, then offers successive discounts of 20% and 10%. Find his net profit percentage.

  1. 0.8%
  2. 1%
  3. 0.5%
  4. 1.2%
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Answer: A. CP=100, MP=140, after 20% discount=112, after 10% discount=100.8, so profit is 0.8%.

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