There are only fiction books and non-fiction books in a collection.
number of fiction books : number of non-fiction books = 3:5 3 : 5\,3:5
There are 45 fiction books in the collection.
Work out the total number of books in the collection.
93 exam-style questions on OCR GCSE Maths Ratio. Each one has a worked solution and a mark scheme showing where the marks go.