Well, and there was I all innocently thinking that we ALL use decimal time...
Nope - I've always used hours and minutes.
It seems to me that the mathematical challenges of both methods are roughly equivalent anyway. Converting minutes into fractions of an hour so you can enter them that way taxes the brain as much (or indeed as little) as adding hours and minutes together.
Six of one and half-a-dozen of the other!
wbryce - see the link above!