Quantitative Aptitude | Questions
Percentage questions with solutions
Percentage is a Quantitative Aptitude topic for competitive exams. It is tested in RRB Ministerial and Isolated Categories, RPF SI, RRB Section Controller, RPF Constable and other exams. This page has 73 solved percentage questions written to the official pattern, with a worked solution under each.
- Question 1Easy
What is 15% of 240?
- A.36Correct
- B.32
- C.40
- D.34
Show solution
15% of 240 = 15/100 x 240 = 36. A quick check: 10% is 24 and 5% is 12, and 24 + 12 = 36.
- Question 2Easy
What is 20% of 200?
- A.56
- B.44
- C.36
- D.40Correct
- E.24
Show solution
20% of 200 is (20/100) × 200 = 40.
- Question 3Easy
What is 25% of 480?
- A.120Correct
- B.140
- C.100
- D.96
- E.150
Show solution
25% is one fourth, so 25% of 480 is 480 divided by 4, which is 120.
- Question 4Easy
Find 25% of 480.
- A.120Correct
- B.96
- C.144
- D.160
Show solution
25% of 480 = 480 × 25/100 = 480 × 1/4 = 120.
- Question 5Easy
A patrol boat consumes 40 litres of fuel. If 15% is reserve and cannot be used, how many litres are available for the patrol?
- A.34 litresCorrect
- B.30 litres
- C.36 litres
- D.32 litres
Show solution
Reserve = 15% of 40 = 6 litres. Available = 40 − 6 = 34 litres.
- Question 6Easy
Find 20% of 350.
- A.70Correct
- B.35
- C.140
- D.105
Show solution
20% of 350 = 350 × 20/100 = 350 × 1/5 = 70.
- Question 7Easy
A number is increased by 20% and then decreased by 20%. What is the net change?
- A.4% decreaseCorrect
- B.No change
- C.4% increase
- D.20% decrease
Show solution
Start with 100. After +20% it becomes 120; after −20% of 120 it becomes 96. Net change = −4%, a 4% decrease. Equal ± percentages on different bases never cancel.
- Question 8Easy
What is 45% of 640 + 28% of 250?
- A.348
- B.352
- C.358Correct
- D.362
- E.368
Show solution
45% of 640 is 0.45 x 640 = 288, and 28% of 250 is 0.28 x 250 = 70. Adding gives 288 + 70 = 358. Converting a percentage to a decimal and multiplying is the quickest route when the numbers are not round fractions.
- Question 9Easy
A quantity of 120 is decreased by 20%. What is the new value?
- A.82
- B.86
- C.110
- D.106
- E.96Correct
Show solution
20% of 120 is 24, so the new value is 96.
- Question 10Easy
Find 12.5% of 400.
- A.38
- B.50Correct
- C.62
- D.66
- E.34
Show solution
12.5% means 12.5/100, so 12.5% of 400 = 50.
- Question 11Easy
Find the value of 15% of 260.
- A.39Correct
- B.42
- C.36
- D.45
- E.30
Show solution
15% of 260 is 15/100 times 260, which equals 39.
- Question 12Easy
A ration store has 500 kg of supplies. If 12% is kept as emergency reserve, how many kilograms are available for daily issue?
- A.440 kgCorrect
- B.460 kg
- C.450 kg
- D.488 kg
Show solution
Reserve = 12% of 500 = 60 kg. Available = 500 − 60 = 440 kg.
These are 12 of 73 percentage questions in the bank. Attempt the rest with instant feedback in the practice drills, or under a clock in the mock tests.
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Frequently asked questions
How many Percentage questions are here?
This page shows 12 worked percentage questions from a bank of 73, spanning 30 easy, 30 moderate and 13 hard. The full set is available to attempt in the timed-free practice drills and the mock tests.
Which exams ask Percentage questions?
Percentage is part of the Quantitative Aptitude syllabus for RRB Ministerial and Isolated Categories, RPF SI, RRB Section Controller, RPF Constable, RRB JE, RRB Technician, RRB ALP, RRB Group D, RRB NTPC. Weightage varies by exam and stage — check each exam's page for its pattern.
Are these Percentage questions free, and are the answers reliable?
Yes. Every question is free, written in-house to the exam pattern rather than copied from a real paper, and the numeric answer keys are recomputed independently at build time — a wrong key fails the build rather than reaching you.