Unit health and gun damage dealt

[jaenak 0]

I've been looking through some config files and got to thinking.  After a little while I hit a wall (so to speak).  The damage guns deal is measured in whole numbers like 5.5, 11, things of the sort.  But the units in OFP have health ratings measured like this:

armor=3;

armorStructural=2.0;

armorHead=0.7;

armorBody=0.8;

armorHands=0.5;

armorLegs=0.5;

What does that mean?  Does that mean that a bullet would have to eliminate 80% of the unit's health to disable the torso (armorbody) or does that mean that it'll take a bullet dealing out 8 points of damage to kill that particular body part?  How do these numbers compute?

Edit: Darn topic won't track.