Khan/khan-exercises — pull request #102873 by petercollingridge (2013-10-31 14:09:04+00:00)
Title: Simplify problems in Converting fractions to decimals

Simplify fraction is exercise (maybe too much?) and tweak DIvider so it doesn't do so much unnecessary computation.
For Trello card: https://trello.com/c/3fNsjuxp/338-converting-fractions-to-decimals