I'm just going to be mainly referring to the congressional proposal method, since the convention method as never been used before.
First, the amendment goes through
proposal by 2/3 of Congress.
Second, the amendment gets
ratified by 3/4 of state legislatures.
If mandated by Congress, each state may have to use a ratifying convention, which is…
when elected delegates vote on the amendment.
The ratifying convention has been used once for the…
21st Amendment - ended prohibition.