Multiplying fractions exercise
Multiplying two decimals exercise
Add negative decimals
Don't bothered multiplying by a leading 0
Align hints correctly
Avoid decimals with trailing zeros
Add percentage exercise
Repeating decimals exercise
Merge remote-tracking branch 'upstream/master' into multi-rat-num
Fix minor issues
Improve how to determine if it's time for the final hint
Simplify things with map and reduce
Improve how multiplier deals with leading zeros
More mapping
fractionSimplify function to convert fractions to integers where required
Rewrite to be much simpler and include a mixture of numbers
Merge branch 'multi-rat-num' of https://github.com/petercollingridge/khan-exercises into petercollingridge-multi-rat-num

Conflicts:
	utils/graphie-helpers-arithmetic.js