The mass of a suitcase is 12.8 kg. After more clothes are added, the mass of the suitcase increases to 16.9 kg.
Work out the percentage increase in the mass of the suitcase. Give your answer correct to 1 decimal place.
56 exam-style questions on Edexcel GCSE Maths Percentage Change. Each one has a worked solution and a mark scheme showing where the marks go.