Exam-Style Question on Percentages
A mathematics exam-style question with a worked solution that can be revealed gradually
Question id: 249. This question is similar to one that appeared on a GCSE Higher paper (specimen) for 2017. The use of a calculator is allowed.
Windthrup bought a car for £9500 which depreciated by 6% in the first year and 3.5% in the second year.
a) Windthrup thinks that in two years his car depreciated by 9.5% over the two years. Show, with any necessary calculations, that Winthrup is wrong.
b) Windthrup's car depreciates by \(x%\) during the third year. At the end of the three years the car is worth £8190. Find the value of \(x\) to three significant figures.
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