Dividing Contractor Vs. Sub-contractor Pay

I was recently sub-contracted for a website. I'm wondering how much of the overall payment I should be entitled to. My contractor obviously needs a decent share of the pay because of their marketing costs, but just how much of that % should that be?

How much would you say is a fair division (% wise) of the total sum?

I'm doing the entire web development (design and coding), while my contractor also acts as the medium for communication with the client. All specs go through my contractor and then reach me, and vice-versa.

Thanks, much appreciated.

The brutal honest facts of the matter are the work is worth exactly what you get for it. Since you (all other things being equal) have no other work to do and lack a relationship with the customer, if you don't take this work then you have no work to do (please don't get up in arms, I am talking from an economic standpoint, but really, if you could take more profitable work, wouldn't you?), so what difference does it make? If you feel the work is not profitable enough to warrant spending your time, you wouldn't take it, so I am working on the assumption that you are not in a choice between jobs. In most business agreements there is no provision to learn the value assigned to your work after you have done it, so if I pay you $1 to do some (profitable to you) work but I can sell it for $1,000, other than you feeling stupid because you can't find those type of customers, you should (from an economic standpoint) be perfectly happy to take the work. If you don't care for the perceived 'loss' in profit (I hope you see that the loss is illusory), cut out the middle man and find the customers directly. I suggest, however, you take care in presuming it is easy or cheap to find and satisfy customers. They have a nasty tendency to demand things they refuse to pay for and cold calling is an exercise in coddling your own ego (unless you really like having doors and phones slammed in your face).

Thank you, that's understandable.