[JediJones]

You need 38 states, not 34 for an amendment (75%). And although there is apparently a process by which states can pass an amendment without the approval of Congress, it hasn’t been done before.

[Windcatcher]

You need a vote in 34 state legislatures to start a Constitutional Convention, and 38 to ratify amendments. However, as the 27th amendment shows, there is no limit to how long we can leave an amendment out there until it is eventually ratified by 3/4 of the state legislatures.

[JCBreckenridge]

34 to propose. 38 to ratify. :)