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
arn 58 thi 86.5 -7.7
-0.6
wel 61 she 80.5 +2.3
mcn 118 war 81 -2.0
-0.1
pin 126.5 tot 101 -1.3
dav 105 tai 67.5 +0.3
-0.1
sco 129.5 con 127.5 -0.1
If winner is:HomeAway
Week of 11/24100.0*Chance in playoffs100.0*Average seed
arn vs con+3.4-2.7
+0.7-0.6
mcn vs she-0.7+0.9
+0.1-0.1
wel vs tot-0.7+0.8
dav vs thi-0.7+0.6
-0.1+0.1
pin vs tai+0.5-0.6
sco vs war-0.3+0.2
-0.2+0.1

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-Lplayoffs123456789101112Count
01-2Out01115531218,067,863
2-10.5%07244325015,991,696
0-3Out754396,769,859
3-025.905213628914,697,046
Total:2.8%002612203221745,526,464
Points
Chance Will Make Playoffs