Ratio, proportion and rates of change

Ratio, proportion and rates of change is one of the six areas of Pearson Edexcel GCSE Maths (exam code 1MA1). On the 72 real exam papers on this site (not counting the specimen papers), ratio, proportion and rates of change questions carry about 24% of the marks on Foundation and 17% on Higher. The topics asked most often are Ratio (55 questions), Direct and inverse proportion (47 questions) and Units and converting units (46 questions).

Each topic below has a revision guide with worked examples, then every past-paper question on it, easiest first, with answers and worked solutions.