how to convert a fraction to float in ruby

Question

I have a string \"1/16\" I want to convert it to float and multiply it by 45. However, I dont get the desired results.

I am trying in

Answer 1

Looks like you're going to have to parse the fraction yourself. This will work on fractions and whole numbers, but not mixed numbers (ie: 1½ will not work.)

class String
  def to_frac
    numerator, denominator = split('/').map(&:to_f)
    denominator ||= 1
    numerator/denominator
  end
end

"1/16".to_frac * 45