In a box there are red pens, blue pens and green pens.
The number of red pens is three times the number of green pens.
The number of blue pens is half the number of green pens.
Find the percentage of pens in the box that are green.
Practise Edexcel GCSE Maths Writing and Simplifying Ratio with exam-style questions for Foundation and Higher tier. 64 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.