Answer:
9 out of 13 or two-third
Step-by-step explanation:
For amending the Articles of Confederation, the first constitution of the United States, a unanimous approval was required. A unanimous approval means that at least two-third of the states approve the amendments for it to be passed. At that time, there were a total of 13 states which means that at least 9 out of 13 states were required to approve of the amendment for amending the Articles of Confederation.