Khan/khan-exercises — pull request #4256 by koriroys (2011-10-12 23:15:51+00:00)
Title: Hints update for equivalent fractions 1

This adds hints to equivalent fractions 1 about how to multiply by M/M.

trello request is:
Add to both equivalent fractions 1 and equivalent fractions 2 a couple hints on how we can multiply by X / X because X / X = 1.

I would append these hints to the end, since the graphical hints give a nice intuition.