In the U.S. Senate, 51 votes are needed to pass a bill on the floor. A bill can also pass on a tie vote (50 - 50 or otherwise), as the Vice President will then cast a vote to break the tie. A bill cannot even reach the floor for a vote, however, if it is the subject of a filibuster unless there are 60 votes for cloture (which will allow a floor vote on the bill). In the U.S. House, 218 votes are needed to pass a bill on the floor.
more than 50%
To be declared the winner, a candidate needs at least 270 electoral college votes.
A majority ( more that half ) of the Senators voting must vote in favor of it to pass a bill. The actual number depends on the number voting. It is rare for all the senators to be present and vote. If the vote is tied, the vice-president of the US can vote to break the tie.
majority on electoral votes
67
2/3 of the voters need to vote to pass it.
270 votes
To become president they need 265 electoral votes.
There's no threshold. They just need to get more votes than their opponents.
Since 1964 the winner needs 270 out of 538.
He needs 2/3 of the votes of the cardinal electors.
If you are properly using the word committee, the answer is 50% plus one, or a simple majority. A committee does not make law. It discusses proposed laws called bills, works out the details, and with a majority vote moves the bill onto the "floor" for a vote of the whole chamber. If by committee you mean the actual full House of Representatives and the Senate, technically all you need there is a simple majority also. But there are complicating factors such as the filibuster in the Senate and various other rules that sometimes make this simple majority not enough for passage.
A two-thirds majority vote in both the House of Representatives and in the Senate is required to override a presidential veto.
All the electoral votes would help one wipe out
270
39
As much as you want