Partnership Compensation

How should I think about compensating people who join my business post-launch? Most of these are still small (with potential), but don't yet make enough to pay someone a full salary.

An equity / profit sharing model makes sense for this type of smaller business– but outside of that I'm not quite sure how to think about what percentage makes sense.

For example, 50/50? 51/49? 60/40? 80/20? 90/10?

How should I think about this?