^v^, you didn't solve my question, just recite it, but you reminded me that I can post picture here.
I have said, in game, it has two contrary description, one of them is what you said.
View attachment 1174927
the damage calculating formula is "Reduced_Damage=Original_Damage*(1-Damage_Reduction%)"<Function I>, Damage_Reduction is capped at 75.
And another description is here:
View attachment 1174934
In this case, you can manage to figure out the damage calculating formula is Reduced_Damage = Original_Damage/(1+Damage_Reduction%)<Function II>, as same as the damage calculating formula in another video game 'Vainglory', and in this case(<Function II>) you don't need to cap Damage_Reduction ,because the damage will never be reduced to Zer0.
Here is the example in the picture below. You have 200 HP and 20 Armor, the enemy's attack is 50 HP per hit, without Armor ,you can only take 4 (200/50=4) hits. Here are the two different cases.
if <Function II> is employed, the reduced damage will be 50/1.2 (50/(1+20%)=50/1.2), so you can take 4.8 (200/(50/1.2)=200/50*1.2=4.8) hits, compared to the origin 4 hits, your effective HP becomes 1.2 (4.8/4=1.2) times of your origin HP, meaning your effective HP is 240 (200*1.2=240), matching the description in the picture below.
However, if the <Function I> is true ,the reduced damage will be reduced to 40 (50*(1-20%)=50*0.8=40), you can take 5 (200/40=5) hits instead of 4.8 hits, meaning your effective HP becomes 1.25 (5/4=1.25) times of your origin HP, meaning your effective HP is 250 (200*1.25=250), contrary to the description in the picture below.
So here comes the question, which of the damage calculating function is true, <Function I> or <Function II> ?
And what caused this mismatch ? a team cooperation failure (one writes description, another makes code) or just due to your poor mathematics knowledge (failed to count the effective HP in the description, ^v^) In last case, envy that you don't need to pass complicated math quiz, most students in China need to participate in complicated calculation like conic equation which is usually calculated by computer in 21th centuries.