Talk:Garen/@comment-5606883-20150319134036/@comment-26231232-20150407163338

It doesn't do damage scaling with how much PERCENT health your opponent has missing, it does damage scaling with how much FLAT health they are missing. So for actual calculations your target's max and current health are irrelevant:

If we take your target's magic resistance to be zero (for easier calculations), then a target with 2000 health at 200 current health, therefore missing 1800 health, will take 525 base damage + 40% of 1800 = 1245 magic damage, while a target with 4000 max health at 400 current health, therefore missing 3600 health, will take 525 base damage + 40% of 3600 = 1965 magic damage.