38 States can ratify a U.S. Constitutional Amendment; there are 24 Initiative States; 24÷38=0.6315, i.e., over 63%. For references, see: Courtesy © Wikipedia, Initiative & Referendum Institute at USC, also FAQ Which States Have Initiatives?
Our Founders' Warning: “Every government degenerates when trusted to the rulers of the people alone. The people themselves are its only safe depositories.” (Thomas Jefferson)