Final answer:
To change the Articles of Confederation, 13 states had to agree to the change.
Step-by-step explanation:
In order to change the Articles of Confederation, 13 states had to agree to the change. The Articles of Confederation, which served as the first constitution of the United States, required unanimous consent for any amendments to be made. This meant that all 13 states had to agree on the proposed changes.
Learn more about Articles of Confederation