Answer:
Most states don't require limited liability companies (LLCs) to have operating agreements that regulate how profits will be distributed.
Since their LLC doesn't have an operating agreement, then the valid state law will rule how the profits will be divided. Generally speaking, but not always, state laws regarding LLCs divide profits equally among its members.
This could all have been avoided if the would have made an operating agreement before starting to work. Now probably the LLC will be dissolved.