Answer:
Two-thirds, three-fourths
Explanation:
The constitutional convention includes the amendmend in the constitution or bring a new constitution into effect. For this reason the constitution allows that two-third of the total states must propose a national constitution convention and propose what are amendmends which are required and important. After a long debate held, the right of vote is given to every state for bringing this constitutional amendmend or new constitution into effect. So to approve the constitution to bring into effect the three-forth of the states have to approve.