What percentage of state legislatures must ratify a proposed amendment before it is added to the ConstitutionWhat percentage of state legislatures must ratify a proposed amendment before it is added t?

To ratify a proposed amendment to the U.S. Constitution, three-fourths of state legislatures, or 38 out of 50 states, must approve it. This requirement ensures that any amendment has broad support across the country. Alternatively, an amendment can also be ratified by conventions in three-fourths of the states.