There are 31 marbles in a jar.
13 of the marbles are blue. The rest of the marbles are green.
What fraction of the marbles are blue?
Practise Edexcel GCSE Maths Writing, Simplifying and Ordering Fractions with exam-style questions for Foundation and Higher tier. 76 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 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.