Commission fees vs overall profit

Beginner Questions
1

When it comes to your average day trader/swing trader - somebody who holds thier positions anywhere from a few hours to 24 hours, with a maxium being 48 … see what I’m wanting to know is when it comes to this sort of trader, how much of thier overall profit (the amount of cash made BEFORE commission fees are taken into account) goes towards paying commission charges?

edit; without taking into consideration commission fees for every $2 profit made, half of it ends up going to commission fees etc

2

It will vary indeed but among day trader/swing traders who consistently make a profit surely there is an exeptable ratio … would a day trader who makes 1k per day profit, would he be happy to watch his broker be charge him 1k per day? … or to put it differently, the difference between a successful day trader and one who can’t make a consistent profit… is the choice of broker they are using … is that about right?