Quoting Camp from the 9th Nov 2017 Renewal patch notes :
Drops are stored as a number of 1-10000
1 being .01% and 10000 being 100.00%
If we do a drops boost of say 25% any item that is less than .04% will receive no effect. But at .04% the item would get that 25% boost and have a chance of dropping at .05%
For example for your question the item would become 1.01%.
However there is lastly a cap of about 90% drop chance on items boost by anything but database edit. That means if a item has a 50% chance to drop and receives a 300% bonus it will still cap at 90%
OK I'm gonna try to explain it as clear as I can, but no guarantees
That 1.00 at the beginning depends on your approach.
If you use 300% in [BubbleGum] the then you do not need to add the 100% base at the beginning.
If you use +200% (Increase by 200%) in [BubbleGum] like what I did, you need to add 100% at the beginning.
It is the basic percentage shown below because we all have to start from something when we set everything to 0 (no VIP, no gear, no server-wide drop bonus, no gum).
If I had to modify the formula, it's gonna be something like this:
[Base Rate] * (100% + [VIP_dropRate] + [GearsWithDropRateBonuses] + [ServerWideDropBonuses] + [BubbleGum]) = [value] + 0.01% = [FinalRate]
But in this case, you MUST use +200% instead of 300%.
And server-wide drop bonuses MUST be 0% as well, since that is the value displayed when you log-in (represented by "Chaos 0.0%")
0.01% * (100% + 50% + 0% + 0% + 200%) = 0.035% rounded down to 0.03%
0.03% + 0.01% = 0.04%
Where:
[Base Rate] = 0.01%
[VIP_dropRate] = 50%
[GearsWithDropRateBonuses] = 0%[ServerWideDropBonuses] = 0%
[BubbleGum] = 200%
Reference:
Ingame: Increase by 200%
iRO Wiki: Triple (300%)
Triple can be represented as ItemRate * 300% or ItemRate * (100% + 200%)
Divine-Pride: Increase by 200%
*Credits to Seiba for the calculation
Edited by Doomsquare, 24 November 2017 - 03:24 AM.