Regardless of which of the two proposal routes is taken, the amendment must be ratified, or approved, by three-fourths of states.
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The US would need to see 3/4ths of the states, or 38 out of the 50, ratify a proposed amendment to the US Constitution for it to be ratified.
2/3 of the State must approve an amendment before it is added to the constitution.
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.
3/4
you need 2/3 of a fraction for a Constitutional Amendment
Three fourths.
No part of congress can amended the Constitution of the United States.First it takes 2/3's of both houses to 'propose' an amendment to the Constitution or 2/3's of all the 'states' legislators to purpose an amendment (this has not happen yet).It then takes a 3/4 vote of the 'states' legislators of the United States, which would presently have to be 38 states being that 2/3's is 37.5 states.Or ratifying conventions in 3/4's of the states approve it, again this would be 38 states. note: This only has happened once, and that was the 21st Amendment, which ended 'prohibition'.So you see only the States can amend the U.S. Constitution.