[Profit]

Here's my thoughts. If you really want to have some type of return %, using the proftis in the numerator makes sense to me.

Say you enter a 10+1 and lose. your profit is -11, numerator is 11 for -100%.

if you just use the return and not profit, your numerator woud be 0, your denominator would be 11 for a 0% return.

That's not a true 0% return, if i somehow came out of a tourney with $11, that would be a 0% return.