Settling it once and fir all

Explain with numbers how that could result in a tie

Are you not aware of how tie-breakers work?

I don't think I'm the one who doesn't understand how basic maths works. So I will repeat since you're clearly struggling.

Let's say we're voting on a Constitutional amendment, which required a 2/3 supermajority. 9 vote yes, 5 vote no, 1 abstains.

There are 15 Congressmen but since 1 abstained there are 14 voting Congressmen. 9 out of 14 is just short of two thirds. But since the Vice-President can cast the tie-breaking vote here, if he votes in favour that makes it 10 out of 15 which is exactly two thirds.

are you not aware of how BASIC MATH works!? Do you guys not learn fractions in England?

9/14 is less than 2/3

you can't just add votes because you didn't get the result you wanted