Omani sponsor - what % do people pay in business? (Muscat)

I am in the process of setting up a new business and have a few options for Omani sponsors - My sponsor would be a sleeping partners (as in will not actively contribute to day to day running of the business)

Can i ask what percentage people pay their sponsor here in general?
I is a small business, with only myself working right now

I have no idea what the going rate is, and this will be discussed soon!

thanks!!