Talk:Weapon Expertise (Season 2012 Mastery)/@comment-71.163.66.129-20120216212125/@comment-5002283-20120530081344

It is multhe correct formula is: 1-(1-0.40))*(1-0.10)=1-0.6*0.9=0.46.

so 46% of the armor will be penetrated. and there is no cap for % penetration.

the correct follow-order is:
 * 1) Flat armor reduction
 * 2) Percentage armor reduction
 * 3) Flat armor penetration
 * 4) Percentage armor penetration