I currently tutor a GSCE student who is very able, but writes his fractions upside down. If a fraction is given to him as a/b he can carry out all manipulations in the form of fractions, but will often make the error of switching the numerator and denominator over when converting to and from divisions. Tonight we were working on a different topic, but when it came to calculating 5 divided by 4, he wrote 4/5. Does anyone have any ideas of how I can help him to remember the link with division? Thank you.