9
All 13 states had to ratify the US Constitution for it to take effect.
Article Seven of the United States Constitution describes how many state ratifications are necessary for the Constitution to take effect.
Many countries have taken aspects of the United States constitution for their own constitutions. Borrowing from political documents is a longstanding tradition, many of the points in the United States constitution were inspired by the British Magna Carta.
9
== == 2 months
I assume that you mean the procedure to amend the United States Constitution. Amendments to the U.S. Constitution require the approval of three-fourths of the states.
9 apex/
Article VII of the US Constitution addresses this: "The ratification of the conventions of nine states, shall be sufficient for the establishment of this Constitution between the states so ratifying the same."
Take away rights of individuals and states.
In 1790 eleven states raitfied the constitution so that it could take effect. It took ten months for them to get eleven states to actually raitfy the constitution.
three-fourths of the states had to ratify the constitution for it to take effect.
9 out of 13 states were needed to ratify the constitution