Independence is a condition of a nation, country, or state in which its residents and population, or some portion thereof, exercise self-government, and usually sovereignty, over the territory. The opposite of independence is the status of a dependent territory.
Depending on the state. If it's a four year federal sentence you will have to do 85% ,or they takeoff 54 days a year for good behavior. Most states abdopted the NERA Act for federal funding (No Early Release Act). Meaning if you're incarcerated for a violent crime you will be required to do 85% of your sentence.
(Probation can be an alternative to prison in most felony crimes.) Good Time - Days subtracted from certain prisoners' sentences for good behavior, required under Michigan law unless the prisoner has violated prison rules; it escalates from 5 days a month to 15 days a month on very long sentences. An additional one-half of regular good time can also be earned for exemplary behavior.