> In 1.8.x, round() simply rounded to nearest integer.
>
> http://www.ruby-doc.org/core-1.8.7/classes/Float.html#M000650
>
> You should update to Ruby 1.9.2.

or define your own round method

class Float
   def round2 n
     "%.#{n}f" % self
   end
end
>> 1.11111.round2(2)
=> "1.11"

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