In 1998, the surface area of a major endorheic lake in an arid region was measured at 5240 km2. By 2018, persistent drought and upstream water diversion projects had reduced its surface area to 1870 km2.
Calculate the percentage decrease in the surface area of the lake between 1998 and 2018.
Give your answer to two decimal places.
You must show your working.
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.