Growth from January to April — Aptitude Question
Growth from January to April: | Month | Unit A | Unit B | Unit C | |-----------|--------|--------|--------| |… Answer and worked solution on CodeKairo.
- Topic: Tables & Charts
- Section: Data Interpretation
- Difficulty: Medium
- Time target: 60 seconds
Question
| Month | Unit A | Unit B | Unit C |
|---|---|---|---|
| January | 400 | 300 | 500 |
| February | 450 | 350 | 400 |
| March | 500 | 400 | 600 |
| April | 550 | 450 | 450 |
By what percentage did Unit A's production increase from January to April?
Options
- 27.5%
- 33.5%
- 37.5%
- 40%
Show the answer and the worked solution
Correct answer: C. 37.5%
Worked solution
- Increase = 550 − 400 = 150.
- Percentage = 150/400 × 100 = 37.5%.
Answer: 37.5%.
The idea
Percentage growth is always measured against the earlier value, never the later one.
Shortcut. 150 on a base of 400 is 3/8, and 3/8 = 37.5%.
Common trap. 27.5% — dividing the rise of 150 by April's 550 instead of January's 400 gives 27.3%, which rounds to it.