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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
The code comment clearly says:
;Be sure to return longs. We don't want to return Clojure Ratios!
Right, the test doesn't match the problem, which means this entire kata is really poorly written or I'm still missing something.
How is this correct? It returns Ratios.