Thanks for that.. the thing is I wanted to make it simpler so I'm using dt assigned per tick to a var called Seconds - I'm so close:
round(Seconds*10)/10
Gives 1.2, 1.2, 1.3 etc (I don't care about third digit so much)
But it breaks for whole numbers ; I want it to show 2.0 and instead it shows 2, which is really messy on a timer.