Yea but the scales don't match. 0-30 isn't very metric, whereas 0-100 is. If you added Fahrenheit to metric I think you'd be much more consistent.
Of course both scales can go above and below the numbers mentioned above, but if you are going to do things based on units of 10 you might as well be consistent.
Of course both scales can go above and below the numbers mentioned above, but if you are going to do things based on units of 10 you might as well be consistent.