Withdrawal method.

Can someone just give me an honest answer on this there is so much about pre cum only get u pregnant if you haven't urinated. Some days it contains sperm anyway. I just want an honest answer, no scare tactics or anything.
If he 100% pulled out away from me, what are the himest chances or pregnancy bearing in mind he urinated before.
PLEASE JUST HONEST ANSWERS, no scare Tactics.