A box contains glass marbles, plastic marbles, and metal marbles. The ratio of glass marbles to plastic marbles to metal marbles is 3:1:8 3:1:8\,3:1:8
What fraction of the marbles are glass?
Practise OCR GCSE Maths Writing a Ratio as a Fraction or Linear Function with exam-style questions for Foundation and Higher tier. 60 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.