3/4 of state legislatures
Two thirds of the states must approve a change to the Constitution before it can go into effect. Since there are currently 50 states, 34 of them must approve any amendment.
3/4 of the states need to approve an ammendment.
38
38
3/4 of state legislatures
3/4% out of the 50
I'm pretty sure it's nine
9
9 out of 13
10
To amend the U.S. Constitution, a proposed amendment must be approved by three-fourths of the state legislatures or by conventions in three-fourths of the states. This equates to 38 out of the 50 states, as the Constitution requires a supermajority for ratification.
Only nine states out of 13 had to approve it