Uneven contribution in partnership

[Scott Loud]

Hello, I’m sure I’m not the first person to ask this but I could not find an existing post after going a few pages deep. 

How does one structure a partnership where the partners may be contributing an uneven split of capital? Say there are three and two put in 40% and one does 20% of the initial investment. How does one handle the same hypothetical situation where we might be pursuing a BRRRR but need to leave money in the deal after the refinance?

thanks