This division comes up quite often, and I dread questions where it is going to appear. I have many 'GCSE borderline C-D ' students who are simply stopped in their tracks by this question. Surprisingly many. They can no more begin to produce an answer than if I had asked them to work out a Fourier transform of x cubed. I am not a numeracy teacher. I am no good at that. I need to be able to take for granted that my students can work with basic numbers. But why am I trying to teach grouped frequency tables to students who have no idea how to approach a question like 45 / 3?