Each House may determine the Rules of its Proceedings, punish its Members for disorderly Behaviour, and, with the Concurrence of two thirds, expel a Member.
No where in the Constitution does it state that for a bill to become a law how many votes shall be necessary. Since Congress first comvended it has been the assumed that only a simple majority would be necessary for a bill to bcome a law.
If the members of the House of Representatives and or the Senate decided to change the procedure to require the approval ofthree fifths or two thirds of the members present they would have the Constitutioinal right to do so.
Whdn a President vetoes a bill a super majority of two thirds of the members of both House must vote to over ride the President's veto.
To remove a Representative of Senators it takes a vote of two thirds of the member present.
When Congress votes on proposed amendments a teo thirds majority vote in both Huses is required.
A super majority of two thirds of the Senators is necessary to successfully impeach the President.
Under the Articles of Confederation it took the approval of 9 of the 13 states to pass a law and the unanimous support of all of the states to amend the Constitution.