Forty-nine states have applied for an Article V Convention (what is often called a "Constitutional Convention"), submitting more 700 applications. Article V does not permit the calling of a "constitutional convention" only a "convention for proposing amendments."
9 states were needed to ratify the Constitution
AnswerAccording to Article V of the US Constitution, 3/4 of the states are needed to ratify a Constitutional amendment. As there are currently 50 states, 38 states are needed to do this.
In 1787, a total of 12 states sent delegates to the Philadelphia Convention, which aimed to address the weaknesses of the Articles of Confederation. Rhode Island was the only state that did not participate in the convention. The delegates ultimately crafted the United States Constitution, which established a stronger federal government.
Take away rights of individuals and states.
9 states
If you mean for a constitutional convention to propose amendments(s) to the Constitution, 2/3 of the state legislatures. As there are 50 states, 33 would be needed for the convention to be called.
To call a convention for proposing an amendment, 34 states are required. Since 32 states have already petitioned Congress, an additional 2 states are needed to reach the necessary threshold for that step to be taken.
Whenever two thirds of both Houses shall deem it necessary, shall 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.
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9 states were needed to ratify the Constitution
9 states are needed to ratify the constitution