round up or round down?

This is a question orginally posted in Q&A but no one knows about it becasue less people read Q&A than riverside INN so I dicide to post the question here.

So here is my Question: If my axe damage is 15.6, will it round up to 16 or round down to 15? If I add 20% from customization, is the final damage 15.6*1.2 or 16*1.2 or 15*1.2?

Here is a summary of what I have asked and what i dunno

1) energy : rounds up
2) enchant: round down
3) weapon dmg: ?
4)shield condition: ?
5) multiple rounding: ?

I am also very curious about rounding in GW. can anyone (devs) give definative answer on this issue.
Do numbers weather they be dmg or bonus's round up ,or down
thx

Weapon damage is calculated as is and then the final result is rounded accordinly. Times are put forth accurately, so say a 19% longer enchant on a 10 second enchant would make the enchant last 11.9 seconds while 20% would be the full 12 seconds.