Talk:Dr. Mundo/@comment-24447033-20140515075322/@comment-24380535-20140517142348

It stacks multiplicative and 61% is right.

100% - 15%  (masterie) = 85%

85% - 35%  (spirit item) = 55,25%

55,25% - 30% (Mundos W) = 38,675

CC only works for ~39% of its maximum duration (61% tenacity)