Congress must call a convention for proposing amendments upon application of the legislatures of two-thirds of the states (i.e., 34 of 50 states). Amendments proposed by Congress or convention become valid only when ratified by the legislatures of, or conventions in, three-fourths of the states (i.e., 38 of 50 states).
How do you ratify an amendment?
The traditional constitutional amendment process is described in Article V of the Constitution. Congress must pass a proposed amendment by a two-thirds majority vote in both the Senate and the House of Representatives and send it to the states for ratification by a vote of the state legislatures.
What are the two ways in which an amendment can be ratified?
The two ways in which an amendment may be ratified is the proposed amendment can be sent to the state legislatures for approval. All but one of the amendments to the Constitution were approved this way. The second way is the proposed amendment can be sent to state conventions for consideration.