[SOLVED] Correct calculation of: %-Aura, reduced mana reservation, reduced mana gem

I think this is a perfectly fine place to put it. It's half-way between Gameplay Help, and Bug Reports, because we have no idea why the tooltip is rounding the way it is. Therefore, it goes in Gameplay Discussion, because it's discussing the game and doesn't exactly fit into either of those, because neither of those will necessarily give you the right answer.
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Thx for info and shameless bump, still need to know it :-S
Your calculation is correct, but the %'s are probably being rounded at each step or something. Being off by a listed 1% has little to no effect on the math.
IGN - PlutoChthon, Talvathir
Well, i want to know it exactly so that i can plan out my build accordingly and others might be interested as well.
A little effect of 1% is still 1%, which in my case actually matters. Thx for the input anyway.
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beysl wrote:
I have 41% reduced mana reserved nodes from skill tree, 74% reduced mana reserved from gem and 506 mana.
I'm not sure what you mean here, but you can't possibly have 74% reduced mana reserved from a gem, as no gem gives that.
And even if it did, your proposed calculation of
"
beysl wrote:
60%*0.59*0.74 = 26.196%
would be wrong, since 74% reduced would be multiplying by 0.26, not 0.74
If you can explain in detail what modifiers are actually in play here, aI can probably show you why the numbers are what they are.
"
Mark_GGG wrote:
"
beysl wrote:
I have 41% reduced mana reserved nodes from skill tree, 74% reduced mana reserved from gem and 506 mana.
I'm not sure what you mean here, but you can't possibly have 74% reduced mana reserved from a gem, as no gem gives that.
And even if it did, your proposed calculation of
"
beysl wrote:
60%*0.59*0.74 = 26.196%
would be wrong, since 74% reduced would be multiplying by 0.26, not 0.74
If you can explain in detail what modifiers are actually in play here, aI can probably show you why the numbers are what they are.


Are you serious? I actually hope you are and that you're not just picking on his grammar cuz that's actually a bit mean. He obviously meant the multipler from Reduced Mana support gem.
IGN Hardcore: Muppman
IGN Beyond: TheTrueAuraBitch or BlixtarOchDunder
Guy on Reddit (called Vislike) seems to have created this awesome tool, very handy for working out aura percentages without much effort:

Path of Exile Reserved Mana Calculator
Therefore, if you have 506 mana, you would need a level 17 reduced mana gem as support along with 45% reduced mana reserved from the skill tree.

Alternatively you could use a level 20 reduced mana gem and only 42% reduced mana reserved from the skill tree, saving you a passive point.
"
keyarchan wrote:
"
Mark_GGG wrote:
"
beysl wrote:
I have 41% reduced mana reserved nodes from skill tree, 74% reduced mana reserved from gem and 506 mana.
I'm not sure what you mean here, but you can't possibly have 74% reduced mana reserved from a gem, as no gem gives that.
And even if it did, your proposed calculation of
"
beysl wrote:
60%*0.59*0.74 = 26.196%
would be wrong, since 74% reduced would be multiplying by 0.26, not 0.74
If you can explain in detail what modifiers are actually in play here, aI can probably show you why the numbers are what they are.


Are you serious? I actually hope you are and that you're not just picking on his grammar cuz that's actually a bit mean. He obviously meant the multipler from Reduced Mana support gem.
Actually mechanics are *very* specific in application.

So while there may be some implicit "he means this" you can't just assume so, and it's better to clarify. Because if he means he once thing, then if you assume its another thing shenanigans ensue.

More importantly, if he's misinterpreting a mechanic you have to make sure he understands the mechanic before you explain and set him straight.
IGN - PlutoChthon, Talvathir
I think i answered this pretty well in a similar thread last week

http://www.pathofexile.com/forum/view-thread/549693/page/1#p4974228

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