Question

An amendment to the US Constitution must be ratified by

Answer 1

 the states can call a convention and each amendment will be ratified by state legislatures. ... Since the United States currently has 50 states, any new amendment to the Constitution must be ratified by at least 38 state legislatures to become part of the Constitution.

Answer 2

Hey Mate here is your answer ,

the congress whenever two thirds of both houses shall deem it necessary , propose amendments to this constitution or on the application of the legislatures of two thirds of the several states shall call a convention for proposing amendments which in either case shall be valid to all intents proposes

I hope it will help you