Thank you for your replies. You're right there was no contract, but it was a freind and I was really seeking individual opinions on what agents out there would think was fair, not necesarily legal (although it was undoubtably, a major mistake). Thanks again.
Whereever you work even with friends or with an understudy always have a written agreement. What ever is generally understood will be generally MISUNDERSTOOD. I just talked to a friend who was deprived of $25,000 in a real estate deal because the deal wasn't in writing and his partner took all of the profit that was suppose to have been 50-50.