Truncate a floating point number without rounding up
You can also convert to a BigDecimal, and call truncate on it.
1.237.to_d.truncate(2).to_f # will return 1.23
Since ruby 2.4 Float#truncate
method takes as an optional argument a number of decimal digits:
1.0155555555555555.truncate(3)# => 1.015