Do tennants in commom have 100 percent occupantcy of entire residence?

Answer 1

Generally each tenant in common has a right to occupy the entire property, however he cannot oust another tenant in common.

Tenants in common may have unequal shares (unlike joint tenants). (Example: A and B may hold as tenants in common, with A holding an "undivided one-quarter interest" and B an "undivided three-quarters interest.") [179]

Rebuttable presumption of equality: If the conveyance does not specify the size of the interests, there is a rebuttable presumption that equal shares were intended.

Answer 2

Depends on what the contract says!