Part of commission in return for help?

[Vonetta Booker]

I'm a fairly newly-licensed RE agent & I'm almost ready to put my first rehab back on the market.  This would be my first listing, so I'd like to enlist the help of a fellow, more experienced agent at my brokerage who's been kind of a mentor to me, to walk me through a smooth selling/closing process.

I'd like to offer her part of my commission in return for her help; what would be an acceptable percentage in a case like this? Thanks!