Powders Converting Neutral Damage Into Elemental Damage

So my tier 6 powder converts 48% of the neutral damage of my weapon into elemental damage, but my weapon has 5 powder slots. So if I use 5 different element tier 6 powders on a weapon, what happens? My friend thought it was split equally across all powders, so that each powder converts 20% of the neutral damage into damage of that element, is this true?

 

If you apply them all at once: I don't know, maybe what you said.

If you apply them one at a time: Probably takes a percent out of the current neutral.

 

But then after 3 tier 6 powders that are applied one at a time you have no neutral damage left, what happens when you add the fourth? Does it only give raw damage?

 

im guessing that it goes like this. say your neutral damge is 100-100 and a powder converts 20% to elemental. the first powder will convert 20 damge to elemental making your damage 80-80. the second powder also does 20%. so it will convert 16 neutral to elemental and so on.

 

50% of 100. 50% of 50. 50% of 25. Etc.

 

Applying them all at once would probably be the best strategy.