Do percents have that much of an impact on final damage?

[OniKun]

My friend, who doesn't care about tekking weapons right, gave me a Stag with -5% Dark, say I used that somewhere, will it be THAT bad in the end? What about trade value, if any?

[ABDUR101]

Since there's already a thread (http://www.pso-world.com/viewtopic.php?topic=52320&forum=1&1) about weapon %'s, ask this question there. That way there aren't double topics and it keeps things more organised, yeah?