Ahmed buys a box of 40 pens for £14.
He sells 30 of the pens for 55p each. He sells the remaining pens for 25p each.
Work out Ahmed's percentage profit. Give your answer correct to three significant figures.
Practise OCR GCSE Maths Percentage Change with exam-style questions for Foundation and Higher tier. 56 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.