Taking off a tenant and adding

[Randy Born]

I rent a house to four tenants and one is moving out. Does anyone know how to take one tenant off the lease and add a new one? They are all under one master lease, so I would assume it is a sublease? Does anyone have an example?

All four are responsible for the rent, so I assume the easiest way is to just subtract one and add the other. 

Thanks!

Randy