In the congressional proposal method, two-thirds of both chambers of Congress must propose an amendment. Identify key steps in the process through which the Constitution is amended.Understand why people might want to amend the Constitution. The Constitutional amendment process has just two steps proposal and approval as outlined in Article 5 of the U.S Constitution. More than 11,000 amendments to the Constitution of the United States have been proposed, but only 27 have been ratified. The first three words of the Constitution are. Amendment One to the Constitution was ratified on December 15, 1791. Article V of the United States Constitution outlines basic procedures for constitutional amendment. 3 The President shall have Power to fill up all. A constitutional amendment is a modification of the constitution of a polity, organization or other type of entity.