Guild Wars 2

The fire trait line has an adept trait skill, and the 25th skill slot that both give 5% extra damage to burning. Do these effects stack to give 10%? Or does it stack multiplicatively? I can’t find an answer through google, so I figured I would ask everyone here.

Mods on attacker are multiplicative, 1.05*1.05*1.1 (burning, burning, fire attun)
Mods on target are additive 1-0.33-0.1+0.01*5 (prot, guardian signet, 5 vurne)
Multiplicative to each other (1-0.33-0.1+0.01*5)(1.051.05*1.1)

Sabull.5670:

Mods on attacker are multiplicative, 1.05*1.05*1.1 (burning, burning, fire attun)
Mods on target are additive 1-0.33-0.1+0.01*5 (prot, guardian signet, 5 vurne)
Multiplicative to each other (1-0.33-0.1+0.01*5)(1.051.05*1.1)

english pls

Razor.6392:

Sabull.5670:

Mods on attacker are multiplicative, 1.05*1.05*1.1 (burning, burning, fire attun)
Mods on target are additive 1-0.33-0.1+0.01*5 (prot, guardian signet, 5 vurne)
Multiplicative to each other (1-0.33-0.1+0.01*5)*(1.05*1.05*1.1)

english pls

i believe hes saying it would be 5%*5% (1.05*1.05=1.1025) = 10.25%

hmmm I can’t see a way to say it much clearer than I did O.o.

Mods short for modifier, thats the thing this topic is about.
Followed by calculation example, followed by explanation for the calculation in brackets.

Razor.6392:

Sabull.5670:

Mods on attacker are multiplicative, 1.05*1.05*1.1 (burning, burning, fire attun)
Mods on target are additive 1-0.33-0.1+0.01*5 (prot, guardian signet, 5 vurne)
Multiplicative to each other (1-0.33-0.1+0.01*5)(1.051.05*1.1)

english pls

Mathematics has no time for your tomfoolery.