Percentage

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

Sample questions

Sample Easy question 1

What is 15% of 240?

  1. 44
  2. 40
  3. 32
  4. 36
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Answer: D. 15% of 240 = (15/100) × 240 = 36.

Sample Easy question 2

A number decreased by 20% gives 160. Find the number.

  1. 200
  2. 210
  3. 180
  4. 190
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Answer: A. 160 = 80% of the number, so number = 160/0.8 = 200.

Sample Easy question 3

Find 25% of 25% of 800.

  1. 50
  2. 55
  3. 45
  4. 40
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Answer: A. 25% of 800 = 200; 25% of 200 = 50.

Sample Medium question 4

A reduction of 20% in the price of apples enables a man to buy 5 apples more for Rs. 100. Find the original price per apple.

  1. 5.5
  2. 4
  3. 5
  4. 4.5
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Answer: C. Solving 100/(0.8p) - 100/p = 5 gives p = Rs. 5.

Sample Medium question 5

If A's income is 25% less than B's, then B's income is what percent more than A's?

  1. 33.33%
  2. 25%
  3. 40%
  4. 30%
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Answer: A. If A = 0.75B, then B is more than A by 25/75 × 100 ≈ 33.33%.

Sample Medium question 6

The population of a town increased by 10% in the first year and decreased by 10% in the second year. Find the net percentage change.

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

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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