They are,
I used my 300%+100% pass I got about 2.7k Exp quarantine.
I mean the event EXP.
The pass will not multiply the total exp with the event but the amount of exp is multiplied by passes and by event in the same value. So if you use passes during event or not is no difference.
The pass will not multiply the total exp with the event but the amount of exp is multiplied by passes and by event in the same value. So if you use passes during event or not is no difference.
Sorry for bad english.
It stacks,
Gained 600 exp without 100% pass.
Give or take 1.X++ with 100% exp pass.