A function to round down to 2 decimal places which has a bug

wrong_round_down.rb

# This function rounds down the given value to 2 decimal places
# **Note!** This implementation looks correct but actually is wrong
def floor_2(value)
  return (value.to_f * 100).floor.to_f / 100
end

p floor_2(3.1415) # => 3.14
p floor_2(2.71828) # => 2.71

p floor_2(33.62) # => 33.61 !?