Answer: 1) Formal amendments may be proposed by a 2/3 vote of each house of Congress and be ratified by 3/4 of the state legislatures, 2) proposed by Congress and then ratified by conventions, called for that purpose, in 3/4 of the states, 3) proposed by a national conventions called by Congress at the request for 2/3 of the state legislatures and be ratified by 3/4 of the state legislatures, and 4) may be proposed by a national convention and ratified by Conventions in 3/4 of the states.
