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*Chance wins title100.0*Top Half100.0*Last Place100.0*Average seed
Penn 38 Princeton 35 -5.1
-20.2
+1.4
-0.9
Dartmouth 10 Cornell 0 +1.3
-1.9
Columbia 14 Harvard 21 +1.1
-1.1
+0.1
Brown 10 Dartmouth 33 -4.2
No
-0.1
Week of 11/11100.0*Chance wins title100.0*Top Half100.0*Last Place100.0*Average seed
Princeton 31 Yale 35 No
No
-0.8
Harvard 6 Penn 23 +0.5
+1.1
-0.1
Cornell 8 Columbia 18 -0.6
If winner is:HomeAway
Week of 11/18100.0*Chance wins title100.0*Top Half100.0*Last Place100.0*Average seed
Dartmouth vs Princeton-0.4+0.4
Yale vs Harvard+0.1-0.1

What If

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

100100100100100100100100
If finish:ChanceTopChance will finish season at seedLast
TPW-Lwins titleHalf12345678PlaceCount
61-0NoNo174242No882,460,688
40-1NoNo100No882,439,856
Total:NoNo82171No1,764,900,544
Games Above .500
Chance Will Win Championship