Equality increases DMG and All Regen by 7.5% per rank of your max HP/MP equality %
If you equipped +2 All sets and +2 Set Numbers ot will give you 5 rank on your set affix.
To calculate: 1+(7.5% * 5)= 1.375
Your Damage and Regen will be multiplied to 1.375
what is the 1+ in your formula? instead of 7.5%*5=no.
That +1 in formula was used because you increased by a percentage. Its the fastest way to calculate percent number.
Lets use 500 as your HP
Instead of this:
500 * 37.5% = 187.5 + 500 = 687.5 HP (increased by 37.5%)
But if you use the +1
500 * 1.375 = 687.5 HP
ahmm ok. Thanks.
Lol… that pangahazzz. You should see the discord chat. Them calculations. 
Yep. I’m generous like that xD. I won’t share immortal build though or many secrets of anybody join for that reason and there’s too many immortal anyway.
I wanna ask another question.,
What is the multiplier of ed+, wd+, hp+?
If this is for arena then for flat WD and flat ED its 1040. For flat HP its 1540.
Flat WD, ED and HP are additive.
is hp% multiplicative of hp flat? is ed% multiplicative of ed flat? on pve.
Yep.
You could look at this thread to have a greater idea about how HP/MP calculated in arena. 
And this post about HP/MP calculation on PVE.
sorry pangahazz but your formula on 1.755=no. is wrong because it doesn’t divide and add the numbers. It should be 7.55= no only.
What do you mean?
What do you mean?
You see what it says at (5) and then divide by 5.
If it says 125% at (5), you need to find out what that is in (1) of the set affix. How? 125÷5= 25% . 25% per rank.
If it says 62.5% at (5) , it would be 62.5%÷5= 12.5% at (1) .
If you want the PvP result with +2 all sets, that (1) becomes (3). That just simply means ×3 the normal % per rank.
If 25% per rank, 75% at (3). If 12.5% per rank , 37.5% at (3). 100% per rank would be 300% at (3) If such a set existed for eg. If 7.5% per rank, it would be 22.5% at (3).
Now I get what he means.
1.75 is the sum of 1+0.75. That 0.75 was the converted value of 75% from 25%*5. You can’t add a whole number with percent so you need to change that decimal number.
yeah I know .75 is 75%.
yeah cuzeg. you got what I mean.
you’re still wrong pangahazz because you think to get e.g. 75% of 100=75+100=175 instead 1001.75=175. but that’s not the proper computation. the correct should be is 75% equality blah blah. It should be.
let’s remove % for example then it would become 755(rank 5)=no.%
correction: 7.5 not 75% sorry just change the no.
Lmao