Before state can vote on an amendment
must be approved by 2/3 of both the Senate & House of Representatives. or 2/3 of the states can request that Congress call a special convention. Then, 3/4 of ALL states must ratify (approve) an amendment before it becomes part of the constitution. Since the Bill of rights was added in 1791, some 10,000 amendments to the Constitution have been proposed. Only 17 have been added.