Talk:Damage modifier/@comment-4605273-20120124115954

I've been looking for this for a while, but seemingly without luck. How does several %-wise damage reductions/increasings scale with each other? For an example, say Kassadin. I'll ignore armor and magic resistance here. If his passive gives him a 15% less magic damage recieved, and he's got a fully stacked Leviathan, giving him another 15% less general damage recieved. What is the full damage reduction then? Physical damage is of course only affected by the Leviathan, so 15% less, but what about magic damage? Is it: a) Additively, 15% + 15% = 30% (duuuh) less? b) Multiplicatively, 1-((1-0,15)*(1-0,15)) = 0,2775% (I believe the calculation is like that) c) Can't touch him anyway, no need for damage calculations.. -.-'

I need to know.. Cuz.. I like being informed. :P

TheZodiac