Of course, the percentage is all that matters. If you damage yourself 10% per month, you're dead in a year. And if you do in absolute value 10x the damage to another party but that's only 1% for them ... they're not dead, you are. And the problem gets solved.
Iran’s doing orders of magnitude more absolute economic damage to the west and its allies than vice versa.
Even the drone strikes followed this math: The patriots were intercepting drones that cost 1% as much as the interceptor.
As far as I can tell, Iran has won every tactical and strategic engagement so far in this war.