Bava Metzia 68 - May 6, 28 Nissan Daf Yomi for Women - Hadran

Today's daf is dedicated in commemoration of Yom HaShoah, in memory of all those who perished in the Holocaust.
Rava mentions three common business practices that he forbade due to usury concerns. What considerations should one bear in mind when entering into a profit-sharing investment arrangement with another individual to steer clear of usury? Besides both parties assuming responsibility for their respective roles, the investing party must compensate the other for their labor to prevent receiving undue benefit, akin to taking interest. How should this compensation be determined? There are various opinions on this matter.