Alright so in the past one weird thing has happened to me which lead to this question. Usually the % you get on a frag depends on damage or status effects applied to the played killed (% of total damage done, paralyze etc). When just doing minor damage or just blocking you usually don't get a high% of a frag.
So what has happened is, I had 100% left to frag on my ek. I decided not to take the risk of getting RSd and would only block/mwall the target, not dealing a single point of damage.
2 minutes later I got 100% frag for that guy with ~10 people killing.
Can anyone explain to me how exactly the system works? Usually for blocking i get around 30% of a frag.