How are these numbers calculated?

Big Games

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

Week of 11/22100.0*Chance in playoffs100.0*Average seed
Ross 83.14 Blair 78.42 +20.0
+0.9
Chris/Jonny 110.14 Alex 126.68 +3.3
+0.1
Goodman 54.68 Aaron 114.8 -2.8
-0.2
Neil 114.38 Cunje 120.04 +1.5
+0.1
Kevin 91.5 Dave 78.62 +1.5
+0.1
Campo 85.18 Nick 69.86 -1.2
-0.1
Week of 11/29100.0*Chance in playoffs100.0*Average seed
Ross 102.98 Alex 87.08 +12.4
+0.8
Chris/Jonny 147.6 Dave 141.8 -5.2
-0.1
Neil 88.9 Campo 85.86 +4.3
+0.1
Goodman 104.38 Nick 98.24 -0.8
+0.1
Kevin 95.82 Aaron 179.8 -0.6
-0.2
Blair 94.74 Cunje 127.12 -0.2
If winner is:HomeAway
Week of 12/6100.0*Chance in playoffs100.0*Average seed
Chris/Jonny vs Aaron-0.4In
+0.2-0.2
Kevin vs Nick-0.4In
+0.2-0.2
Blair vs AlexIn-0.4
+0.1-0.1
Ross vs DaveIn-0.4
+0.7-0.7

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
81-0In2550258,995,039
70-199.1%2584019,004,505
Total:99.6%12264120017,999,544
Games Above .500
Chance Will Make Playoffs