The resale value of a smartphone decreases by d% d\%\,d% each year.
The smartphone's value will decrease by 70% in 3 years, work out the value of ddd.
Give your answer to 2 decimal places.
Practise AQA GCSE Maths Repeated Percentage Change with exam-style questions for Foundation and Higher tier. 56 questions, matched to the AQA GCSE Maths (8300) specification and written in Paper 1, Paper 2 and Paper 3 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.