Working alone, a carpenter makes 4 chairs a day. A workshop then divides the work among 5 specialised workers, who together make 30 chairs a day. By what percentage has output per worker risen?
- Output per worker with division of labour = 30 ÷ 5 = 6 chairs a day.
- Rise in output per worker = 6 − 4 = 2 chairs a day.
- Percentage rise = (2 ÷ 4) × 100 = 50%.
Answer: Output per worker rises by 50%, from 4 to 6 chairs a day.