Question about %damage

[Qooger]

Hi all, when a skill or passive says: "increase all damage by 30%" or "increase damage by 30%", does it mean that if one of your skills does 200% weapon dmg, that it would increase that skill's dmg to 230%(200% + 30%) or would it mean that it would increase it to 260% (30% * 200%= 60%, 60% + 200%=260%)?
TYVM!

[galzohar]

Bonuses generally seem to multiply in Diablo 3 (like you said). But you never really know.

[Bridgeburners]

Your damage isn't your weapon damage. It seems logical that they're referring to your actual damage. However, we don't know if Blizzard is communicating it properly. I assume the latter is the case, but one has to test it to be sure.