How are these numbers calculated?

Big Games

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

Week of 11/17100.0*Chance in playoffs100.0*Average seed
wel 61 she 80.5 -18.5
-0.8
mcn 118 war 81 -4.7
-0.1
pin 126.5 tot 101 -2.3
-0.1
arn 58 thi 86.5 +1.7
+0.1
sco 129.5 con 127.5 -0.3
dav 105 tai 67.5 +0.3
If winner is:HomeAway
Week of 11/24100.0*Chance in playoffs100.0*Average seed
wel vs tot+15.7-17.9
+0.7-0.8
dav vs thi-4.3+3.9
-0.2+0.1
mcn vs she-3.5+4.3
-0.1+0.1
pin vs tai+3.4-3.7
+0.1-0.1
sco vs war-1.5+1.4
-0.1+0.1
arn vs con-0.1+0.1

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-Lplayoffs123456789101112Count
02-154.9%1134132111017,371,246
1-22.932142286016,785,054
3-098.407334018205,970,796
0-3Out1732441515,399,368
Total:34.9%015101920211572045,526,464
Points
Chance Will Make Playoffs