Percentage

JKSSB Junior Assistant · Numerical Ability · 81 practice questions with answers and explanations: 39 Easy, 26 Medium, 16 Hard.

Sample questions

Sample Easy question 1

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

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

Sample Medium question 2

A number is first increased by 30% and then decreased by 20%. Find the net percentage change.

  1. 2% increase
  2. 4% increase
  3. 6% increase
  4. 8% increase
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Answer: B. Net change = (1.30 × 0.80 - 1) × 100 = (1.04-1) × 100 = 4% increase.

Sample Hard question 3

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

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