0580/43 Oct/Nov 2025, Question 21: Percentage Increases and Decreases
Cambridge IGCSE Mathematics 0580 · Paper 43 (Extended) · Calculator · 4 marks
اقرأ هذا الحل مشروحاً بالعربي ←
The question, in short
Compare a dressmaker's hourly rate making 4 dresses in 12 hours 30 minutes with the rate for the remaining 27 dresses, given 75 hours total, and find the percentage increase.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 4 marks
- 1Week 1 rate = 4 ÷ 12.5 = 0.32 dresses per hour
- 2Week 2 time = 75 − 12.5 = 62.5 hours
- 3Week 2 rate = 27 ÷ 62.5 = 0.432 dresses per hour
- 4Increase = (0.432 − 0.32)/0.32 × 100 = 35%
Answer35
Stuck on a step? Read the free lesson: Percentage Increases and Decreases
Practise more percentage increases and decreases questions
Real 0580 past-paper questions, marked on your working like the exam, with a worked solution for every part.
Practise free on LemmaraMore past-paper questions on percentage increases and decreases
Also searched as: 0580/43/O/N/25 · 0580_w25_qp_43 · 0580 w25 43 · question 21.
Lemmara is an independent study tool, not affiliated with or endorsed by Cambridge International Education. The worked solutions are Lemmara’s own.