Cmdr DeadMeat

I am a bit new with WW2 things but very very interested in WW2. And I have some terms what I want to know: Tanks have armor. For example Panzer IVH with skirts has in Lower Hull front armor 80/14. What does these numbers stand for? If they were xx/yy what would xx mean and would it be better to be high or low? And same with yy? Infantry has firepower. What does that firepower number stand for? Like german Rifle Squad 41 has firepower 24 at 500m. What's that 24? Thanks for answers!

So, when comes the patch out that corrects the graphics for CM:BB and stuff. Thanks for info.