On Aug 22, 2010, at 18:02 , Rob Biedenharn wrote:
> 
> Or even Numeric:
> 
> irb> 1.class.ancestors
> => [Fixnum, Integer, Numeric, Comparable, Object, Kernel, BasicObject]
> irb> class Numeric
> irb>   def percent
> irb>     self.to_f / 100.0
> irb>     end
> irb>   end
> => nil
> irb> 5.percent
> => 0.05
> irb> 125.percent
> => 1.25
> irb> 14.7.percent
> => 0.147
> irb> (99+"44/100".to_r).percent
> => 0.9944

I said Integer because of how the original problem was described. I thought about floats and decided quickly that it didn't make sense... but looking at your examples above, that actually works and reads pretty well.