Business Agreement

Dear Sirs My friend and I have started gym with equal share of investment. Both of us orally agreed to equally share both profit n loss, investment and expenses. But most of the times he manages the gym. Now we want to enter into agreement with each other to avoid future conflicts that may arise while running the gym. Please help us to draft an agreement where he can maintain the gym along with 51% of profit and I can have 49% with an option to invest further. Please help us, any business agreement format in this regard is highly helpful. Thank you sirs Santosh