A farmer has 200 animals on his farm. The animals are either sheep, cows, pigs or goats.
15% of the animals are sheep.
25\displaystyle \frac{2}{5}52 of the animals are cows.
The ratio of pigs to goats is 7:37:37:3.
Work out the number of pigs the farmer has.
93 exam-style questions on OCR GCSE Maths Ratio. Each one has a worked solution and a mark scheme showing where the marks go.