String to number - incorrectly processed?

Question

ruby

Hello. Tell me how to solve this problem correctly? When translating and truncating the length after the decimal point, does it incorrectly process the number ?
puts ('2.01').to_f.truncate(3) # 2.009

Answer 1

And what is the task?
puts sprintf("%3f", '2.01').to_f # 2.01