FAST-NU Basic Mathematics — Percentages
Percentages is part of the Basic Mathematics section of FAST's BS CS/Engineering admission test (usually 20 of the 120 MCQs, 20% of the marks). It breaks into 2 subtopics, and we hold 49 FAST-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (2)
How Percentages is tested
Across the 7 FAST-pattern papers on ParhaiKrlo, Percentages accounts for 14 questions. It appears in all 7, about 2 questions a paper. The heaviest was FAST Past Paper 07, with 2 questions.
| Paper | Questions |
|---|---|
| FAST Past Paper 07 | 2 |
| FAST Past Paper 06 | 2 |
| FAST Past Paper 05 | 2 |
| FAST Past Paper 04 | 2 |
| FAST Past Paper 03 | 2 |
| FAST Past Paper 02 | 2 |
| FAST Past Paper 01 | 2 |
Percentages MCQs from the FAST-pattern papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · FAST Past Paper 07 · Percentages
If a quantity increases by 50%, the new value is ______ of the old value.
- A.50%
- B.100%
- C.150%
- D.200%
Show answer
Answer: C. 150% — Old value (100%) + increase (50%) = 150%.
- Q2 · FAST Past Paper 06 · Percentages
The length of a rectangle is increased by 20% and its width is decreased by 20%. Its area:
- A.is unchanged
- B.increases by 4%
- C.decreases by 4%
- D.decreases by 20%
Show answer
Answer: C. decreases by 4% — New area = 1.2 × 0.8 = 0.96 of the old area, i.e. a 4% decrease.
- Q3 · FAST Past Paper 05 · Percentages
If the price of an item doubles, the percentage increase is:
- A.200%
- B.100%
- C.50%
- D.2%
Show answer
Answer: B. 100% — The increase equals the original price, which is 100% of it.