Question

How many state legislatures need to ratify a proposed amendment before it becomes part of the U.S. Constitution?

Answer 1

Whether amendments are first proposed by the states or Congress,three quarters of the states must ratify (or approve) them before they become a part of the Constitution—the law of the land. There are a total of 27 amendments. The first 10 comprise the Bill of Rights, which was ratified in 1791.