How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 11/4100.0*Last Place
Penn 38 Princeton 35 +2.3
Brown 10 Dartmouth 33 Yes
Columbia 14 Harvard 21 +0.2
Dartmouth 10 Cornell 0 +0.2
Week of 11/11None
Week of 11/18None

What If

Chances based on how well the Brown finish out the regular season.   Explain

If finish:ChanceTopChance will finish season at seedLast
TPW-Lwins titleHalf12345678PlaceCount

* Row combines multiple less frequent records.

Games Above .500
Chance Will Win Championship