Answer:
2/3 majority of vote
Step-by-step explanation:
The United Nations has given the power to use the veto to President in the case if he is not satisfied with the Bill which is proposed by the congress. Bill can be passed only after the signature of President. In one scenario Bill can be passed by overriding the veto power of President if congress can gain majority of 2/3rd members. In this situation bill can be passed without the sign of President.