What are the two ways in which the Constitution can be amended? And how many votes are needed in order for it to be approved?

I believe in order for the Constitution to be amended, one way is that 2/3 (two-thirds) of both houses of Congress needs to vote to propose an amendment, and the other way is to two-thirds of the state legislature ask Congress to call a national convention to propose amendments.

Explanation:

i think it would be reparing roads  

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.