3/4 of the legislatures of each state or ratifying conventions of each state, as Congress so directs, is needed to approve an amendment to the US Constitution.
3/4
2/3
For the US Constitution, states must ratify any amendments. Typically amendment are passed by Congress and sent to the state legislatures, where 3/4 of these legislatures must approve the amendment in order for it to be ratified and become part of the Constitution. For state constitutions, voters within the state must approve any amendments passed by the legislature or by any convention called for that purpose.
The first is the states legislative body can approve the amendment. The other is the states consititutional convention delegates are authorized to approve the amendment. The full details can be found in Article Five.
An amendment may become part of the US Constitution on ratification. Ratification requires that three fourths of the states vote for the amendment in their state legislatures.
3/4 of the states need to approve an ammendment.
The Amendment process is the formal way to change the Constitution. An amendment may be proposed by two-thirds vote of both houses of Congress or by a convention called by Congress at the request of two-thirds of the state legislatures. Ratification of an amendment takes three-fourths of the states to approve.
Amendments to the Constitution may originate from either body of Congress or from a Convention called into creation by two thirds of the state legislatures. Amendments from the former must pass both bodies of Congress with a two thirds majority at which point the Amendment is considered proposed to the states and the ratification process begins. For proposed Amendments to become law three fourths of the states' Legislatures must approve ratification of the Amendment. Currently this requires 38 of the 50 states.The President plays no official role in the passage or rejection of Amendments to the Constitution. The President has no veto power in the process.
Congress
two-thirds in the Senate, two-thirds in the House of Representatives, three-fourths of the states
In order for the Bill of Rights to become law, it required ratification from three-fourths of all state legislatures. The Bill of Rights was officially ratified on December 15, 1791.
The Constitution can be changed through the process of amendment. An amendment can be proposed either by two-thirds of both houses of Congress or by a national convention called by Congress when requested by two-thirds of the state legislatures. For an amendment to be ratified and become part of the Constitution, it requires approval by three-fourths of the state legislatures or conventions in three-fourths of the states. This process ensures that any changes to the Constitution are carefully considered and have broad support across the country.
There are two ways to propose and ratify amendments to the Constitution. To propose amendments two thirds of both houses of congress can vote to propose an amendment, and two thirds of the state legislatures can ask congress to call a national convention to propose amendments.
There are two methods: 1. A specific amendment is written and proposed by 2/3 of the Congress. Then the proposed amendment is sent for ratification to either the state legislatures or state ratifying conventions. Congress decides whether state legislatures or state ratifying conventions are to be used. For the proposed amendment to become effective 3/4 of the legislatures or conventions must ratify it. 2. A convention for proposing amendments is called for by Congress on application by 2/3 of the states for such a convention. Specific amendments are written by the convention and sent to the states for ratification. Even if the proposed amendments come from a convention rather than from Congress, it is Congress which decides whether ratification is to be by state legislatures or state ratifying conventions. Again, for the proposed amendments to become effective, 3/4 of the legislatures or conventions must ratify the proposed amendments. To date the first method, proposal by Congress itself, is the only method by which amendments have been proposed. None of the existing amendments have been proposed by a national convention. To date every amendment to the Constitution with the exception of the Twenty First Amendment (Repeal of the Eighteenth Amendment), has been ratified by state legislatures. The Twenty First Amendment is the only current amendment that has been ratified by state ratifying conventions.