[ANSWERED] Percentage Bonus (How are they applied?)

Additive or cumulative? Do (2) 10% bonuses to 100 turn out to be 120 or 121?

In your example, two 10% bonuses to 100 would become 121.

Cool! So, for us other new players, do not underestimate the power of (6) monsters that give 15% bonus to any attribute for each monster of their kind.

Six of those types wouldn’t just be getting 90% (15*6%) bonuses to a given attribute, since the effective % would actually be:

If the given attribute is 100…

100 + 15% = 115
115 + 15% = 132
132 + 15% = 152
152 + 15% = 175
175 + 15% = 201
201 + 15% = 231

The effective rate is a 130% increase! (instead of 90%)

That’s actually one of the few times where percentages are additive. A creature’s ability that increases stats by a percentage are added together before being applied, but if two or more abilities modify a stat using percentages then it’s calculated multiplicatively. It might be better for me to use an example:

Let’s say that Creature A has 100 health and an ability that increases the health of all creatures by 15% for each other creature fighting on its side (including itself), and we have a total of 6 creatures. Each creature would then gain 90% additional health (6 creatures * 15%), so Creature A’s health is now 190 (100 * 1.9). However, if Creature B has an ability that increases the health of all creatures fighting on its side by 50%, then Creature A would now have 285 health (190 * 1.5). Hopefully that makes sense.

So, identical bonuses are additive and different bonuses are cumulative.

5 of same bonus of +10% would be added for 50% bonus… 100 + 50% = 150.

Then if there is a sixth creature with +100% health, then 150 + 100% = 300.