Answer:
The states that need to ratify a constitution for it to become legal are nine states, that is 70% approval over the required threshold of thirteen states for amendment proposals to states which require all the 75% of the total states threshold.
Step-by-step explanation:
Article seven of the US constitution provides that, in the event where, nine member states ratify a constitution (70%) then, it is qualified to pass as legal.
Differently, the approval of an amendment to the states must comply with the law that requires it to be ratified by at-least 75% of the total, which is higher by 5% compared to the one for ratification of the constitution.