1. The problem statement, all variables and given/known data I'm working through some exercises in which I'm supposed to convert various units of speed from SI units to other units Example: 0.4m/s into km/h 2. Relevant equations 3. The attempt at a solution Having checked, I know my answer to be (to 3 significant figures) correct. My confusion arises regarding significant figures. Wouldn't 0.4 be 1 significant figure, which, if I remember and understand correctly, influences how the answer must be expressed, which in turn would leave me with a answer value of 1.