Guild Wars 2

just curious..like how much power would equal a 1% increase in damage?

This may not the best answer but maybe you can work with this information

Attack is a value that is listed on the hero panel. It is derived from adding the character’s power attribute and the max weapon strength of the equipped weapon (or average of max weapon strength if two one-handed weapons are equipped). This is purely a derived value and is not directly used in any calculations: damage for weapon skills is based on the product of weapon strength and power, while utility skill damage is only based on power.

That’s a rather difficult answer to give to a seemingly simple question.

This is as close of an answer that you’re gonna get:

Damage done = (weapon strength) x Power x (skill-specific coefficient) / (target’s Armor)

For more indepth coverage of your question, read this page:

http://wiki.guildwars2.com/wiki/Damage