There were thirteen colonies at the time. They wrote that Nine out of Thirteen had to agree to the constitution for it to go into effect.
216
2/3 of the voters need to vote to pass it.
2/3 of Senate
A simple majority ( 51 votes if all vote) will pass any bill in the Senate. (Please note that all tax bills must originate in the House.)
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.
After Googling to find the number of Representatives and finding out that there needs to be a two thirds majority, there will have to be 36 votes to pass the budget. There are 33 democrats and 20 republicans. Brown will have to get 3 Republicans to vote with the Democrats to pass the budget.
If all members vote, 51 votes are needed to pass a bill. Otherwise it passes if more than half of the votes are "Ayes".
Well, to overrule a veto: 2/3
9votes, including those of permanent members
This would take a simple majority in both Houses of Congress. 218 votes in the House and 51 votes in the Senate if all seats are filled and everybody votes. The VP could break a tie-vote in the Senate.
They would not have enough state votes to pass the constitution if slavery was outlawed by it. The south would have voted against it.
3/3