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ASVAB Percentages Questions
Practise percentages (quantitative aptitude) for the Armed Services Vocational Aptitude Battery: 10 multiple-choice questions, each with the correct answer and a worked explanation. Click an option to check it, or “New questions” for another set.
Percentages practice
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Q1.What is 18% of 140?
Show answer & explanation
Answer: D — 25.2
18% of 140 = 18/100 × 140 = 25.2.
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Q2.The price of an item changes from $350 to $455. What is the percentage change?
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Answer: A — 30% increase
Change = 105 on a base of 350: 105/350 × 100 = 30% increase. Always divide by the ORIGINAL value.
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Q3.Two successive discounts of 25% and 5% are equivalent to a single discount of:
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Answer: B — 28.75%
Net discount = a + b − ab/100 = 25 + 5 − 25×5/100 = 28.75%.
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Q4.Two successive discounts of 30% and 12% are equivalent to a single discount of:
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Answer: D — 38.4%
Net discount = a + b − ab/100 = 30 + 12 − 30×12/100 = 38.4%.
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Q5.What is 18% of 640?
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Answer: A — 115.2
18% of 640 = 18/100 × 640 = 115.2.
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Q6.What is 20% of 480?
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Answer: C — 96
20% of 480 = 20/100 × 480 = 96.
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Q7.What is 12% of 720?
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Answer: C — 86.4
12% of 720 = 12/100 × 720 = 86.4.
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Q8.The price of an item changes from $400 to $480. What is the percentage change?
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Answer: C — 20% increase
Change = 80 on a base of 400: 80/400 × 100 = 20% increase. Always divide by the ORIGINAL value.
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Q9.Two successive discounts of 10% and 10% are equivalent to a single discount of:
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Answer: D — 19%
Net discount = a + b − ab/100 = 10 + 10 − 10×10/100 = 19%.
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Q10.Two successive discounts of 15% and 12% are equivalent to a single discount of:
Show answer & explanation
Answer: A — 25.2%
Net discount = a + b − ab/100 = 15 + 12 − 15×12/100 = 25.2%.
How to approach percentages questions
Convert percentages to fractions you know by heart (12.5% = 1/8, 37.5% = 3/8, 16.67% = 1/6) and always divide a change by the ORIGINAL value. Two successive changes of a% and b% combine to a + b + ab/100.
About ASVAB
Armed Services Vocational Aptitude Battery — conducted by US Department of Defense. Determines eligibility and job placement in the US military.
Original practice questions written for this site in the style and difficulty of each exam’s syllabus. They are not past papers and the site is not affiliated with any exam body. Exam patterns, marking schemes and syllabi change — always check the latest official notification.
ASVAB practice topics
| Topic | Section | Question source |
|---|---|---|
| Algebra | Mathematics | Calculated (new numbers every set) |
| Percentages | Quantitative aptitude | Calculated (new numbers every set) |
| Physics | Science | Calculated + question bank |
| Vocabulary & Idioms | English | Question bank |
| English Grammar | English | Question bank |