Another thornmail discussion...
Ok so if I did this math correctly 25% of 127 plus 15% of 130 is 51.25. So tell me why sivir took 158 from thornmail. I would have a pic to go with this, but it's on my phone and idk where to put it. In the pic I'm riven and I have 5 thornmail and 1 hextech gunblade, my total armor is 591, and sivir did 130 to me and took 158 from thornmail. Also the 158 has (20) in white above it. Maybe it's because I didnt factor in the damage that was reduced, if so whats the math for that. I was thinking that maybe since it don't stack it reads each thronmail individually turning 51.25 into 256.25 (51.25×5) and boom hits sivir and gets reduced to 158.