Contents

module Maths
  # Public: Represents a number that should be formatted as a percentage
	class Percentage < BigDecimal
    # Pretty much idential to a BigDecimal
    
    # Public: Builds out a fraction by the numerator and denominator
    def self.build(numerator, denominator)
      numerator = BigDecimal.new(numerator.to_s)
      denominator = BigDecimal.new(denominator.to_s)
      Percentage.new(((numerator / denominator) * 100).to_s)
    end
    
    # Public: Calculates the % change of from to to
    def self.change(from, to)
      Percentage.new((((to / from) - 1) * 100).to_s)
    end
  end
end

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
maths-0.0.14	lib/maths/percentage.rb
maths-0.0.13	lib/maths/percentage.rb
maths-0.0.12	lib/maths/percentage.rb
maths-0.0.11	lib/maths/percentage.rb