Answer:
Article V of the Constitution provides two ways to propose amendments to the document. Amendments may be proposed either by the Congress, through a joint resolution passed by a two-thirds vote, or by a convention called by Congress in response to applications from two-thirds of the state legislatures. The Constitution can be changed or amended when it is deemed necessary by the people to adjust to changing times and to maintain a "living" document. The amendment is proposed by a vote of two-thirds of both houses in Congress and the 2/3 state legislatures call for a national convention.