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.
Unfortunately, because of a mistake in the way the good time statute (18 U.S.C. Â§ 3624(b)) was written, prisoners actually earn only 47 of the 54 days of good time credit for which the law says they are eligible. Only Congress can fix this small technical error.