class ActiveSupport::NumberHelper::NumberToCurrencyConverter

def convert

def convert
  format = options[:format]
  number_f = valid_float?
  if number_f
    if number_f.negative?
      number_f = number_f.abs
      format = options[:negative_format] if (number_f * 10**options[:precision]) >= 0.5
    end
    number_s = NumberToRoundedConverter.convert(number_f, options)
  else
    number_s = number.to_s.strip
    format = options[:negative_format] if number_s.sub!(/^-/, "")
  end
  format.gsub("%n", number_s).gsub("%u", options[:unit])
end