São Paulo is the largest city in Brazil, with an estimated population of 12,000,000, while the capital city, Brasília, has a population of approximately 3,000,000.
Calculate the ratio of the population of São Paulo to the population of Brasília in its simplest form.
87 exam-style questions on OCR A GCSE Geography Numerical and statistical skills. Each one has a worked solution and a mark scheme showing where the marks go.