Gem probability_to_friendly_string, requires Ruby 2.5.1 or above.

Usage:

require 'probability_to_friendly_string'
friendly = ProbabilityToFriendlyString::FriendlyProbability.fromProbability .723

friendly is a class of type FriendlyProbability that has properties

• friendlyString: a string representing the probability (in this case "5 in 7")
• friendlyDescription: a string representing a qualitative description of the probability (in this case "Good chance")
• numerator: the numerator of the probability (in this case 5)
• denominator: the denominator of the probability (in this case 7)

Note that passing a value less than 0 or greater than 1 to FriendlyProbability.fromProbability() will raise an RangeError