Support for the Ruby 2.4 series has ended. See here for reference.
Numeric
BigDecimal extends the native Float class to provide the to_d method.
When you require BigDecimal in your application, this method will be available on Float objects.
Convert flt to a BigDecimal and return it.
require 'bigdecimal' require 'bigdecimal/util' 0.5.to_d # => 0.5e0
# File bigdecimal/lib/bigdecimal/util.rb, line 39
def to_d(precision=nil)
BigDecimal(self, precision || Float::DIG)
end