Looks like 2/3rds to me!
This Repeal Amendment, which lets the states repeal Federal legislation is a good idea.
Other good amendment ideas… Balanced Budget, Flat Tax, and No Anchor Babies.
Or just have one Big amendment, called the “Fixing stupid ideas from the past Amendment”.
I’d also favor a part-time Congress. And not permitting serial holding of political offices.
I suspect that 80% of the population would like these ideas, and 0% of the political class.