In order for an amendment to be added to the US constitution the proposed amendment musT A)be approved by Congress B)be approved by the senate C)pass both houses of Congress, be approved by a simple majority of states, and be signed by the president. D)Pass with 2/3 vote in each house of Congress and be approved by the state legislatures of 3:4 of the states. ✌
The framers of the constitution knew this as the country grow they need to add or change the existing laws so they added the feature of amendment in the constitutions by which later legislatures could amend the constitution.
The National legislature could amend the National Constitution by 2/3 of congress.
The state legislature could amend the state Constitution by 3/4 of the state majority.