Nope, not even that: 2/3 majorities of both houses of Congress need ratification by 3/4 of the several states to change the Constitution.
You got me. Mea Culpa...The only thought on my mind at the time of reading, assuming that the constitutional amendment had already passed through congress, which indeed does require a super-majority, is that it needed to be ratified by the states and that in order to do that, it also required a (more than) super-majority. Don’t knwo why I identified 2/3 vice 3/4 except that I must be getting mushy in the brain. As indicated by another poster, I am an old fart!