38 armor vs 450 armor...

i dont know 38 or 450 i still get blown up in 1 sec .

Every point of armour gives 1% more effective HP against physical damage. So if you have 1000 HP, every bit of armour means 10 more damage you can take. The percentages you're looking at look bad, but flip the coin.

At 100 armour, you're taking 50% damage from AD. At 200, you're taking 33%. That's going from 1000 EHP at 0 armour, to 2000 at 100 armour to 3000 at 200. You see the trend? While the percentages look bad, they're not really helpful for understanding the actual effect. Armour does NOT fall off. It's just best not to purely stack armour because a combo of armour and HP is best for maximizing your EHP against physical damage (and HP helps against AP too).

1000 HP + 100 Armor = 2000 Effective HP Against Physical Damage 1000 HP + 200 Armor = 3000 Effective HP Against Physical Damage 1000 HP + 300 Armor = 4000 Effective HP Against Physical Damage

It scales linearly.

Did you know 99% damage reduction will live twice as long as the one with 98%?

The more you have the less value you get out of it.

In the end riot's logic and math often suck.

So you dont have 100% damage reduction or some similar number?

It's pretty obvious..

Because 99% damage reduction isnt really healthy?

It's exponential, given the function "1 - 100/(100 + armour)"% damage reduction or something

What you probably want to do is only go as high as 200-250 armor or mr or both. That's probably your highest and best numbers, about 60-79% damage reduction. Any more and it isn't worth building armor for a few 2-6%... Go damage or more hp or utility

Armor (and magic resist) effectively increase your health against that damage type by (Resistance)%.

If you have 50 Armor, your effective health against physical damage is 150%.

If you have 450 armor, your effective health against physical damage is 650%.

Conversely, if you have -100 armor, you take 100% MORE physical damage, or you have effectively 50% health.

And if you have -450 armor, you take 450% more physical damage, or about 18% effective health.

I have explained this to at least a 100 people over a dozen threads in the past 2 years, I am really really am losing faith in Gameplay's ability to learn.

?? Where are you getting those numbers?

You get 27.5% with 38 armor and 81.8% with 450 armor.

That means if you take 100 dmg before resists, you'll take 72.5 dmg in case 1 and 18.2 in case 2, so 72.5/18.2=~4. You're about 4 times tankier, without counting pen and without counting any difference in hp you may have, or magic/true dmg.

So what's your point? You want to be 12 times tankier because you have 12 times the armor? That's complete nonsense! If that were the case then for the first case, you'd buy 40 lethality and deal infinite damage. The current system for armor is fine, the problem is not that. The problem is there's too much damage in the game and the current item system is terrible.

Armor increases your Health against the respective by the same % as the number shown.

Having 38 Armor increases your respective health against physical damage by 38%. Having 450 Armor increases your respective health against physical damage by 450%. The number will hardly ever reach 85%+ without some insane armor buffing passive or infinite stacking like Sejuani or Thresh's passives.