Splitting Profits on flipping houses?

[Natalia Jimenez]

Hello, I need advise as to how to split my profits if i go into a partnership with my brother who is a general contractor. We are looking to buy a foreclosed home to flip and sell in as little as 6 months. I would be putting the down payment down on the house plus using my lowes card to buy all the material, he would be just doing the remodeling of the home. He says he just wants a percentage of what the house is sold for. Now we live in Connecticut and are looking into buying in the New Haven County Area, Basically buying a house that costs about 50k flipping it and selling for example 100k. If i put 20k down cash and put the rest on a loan and the material on a card, how much should his half be? 

Please Advise I'm new to the House Flipping Business.

Thanks