How to split profit?

[Amy Zhang]

I am planning to invest in a property with 2 other persons. I will bring 42% of capital. Person A will bring 42% of capital and Person B will bring 16% of capital. Person A will also do all labor work i.e buying and renovating the property. How should we split the profit? Should we estimate how much labor would cost and add that to person A's capital? And then split the profit based on % contribution? 

Any advice would be appreciated.