How are these numbers calculated?

Big Games

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

Week of 11/18100.0*Chance in playoffs100.0*Average seed
Drew 98.98 Brian 126.48 +20.2
+1.3
Justin 125.4 Anton 115.82 +5.5
+0.2
Dan O 130.52 Nick 149.48 -2.1
-0.1
Cassidy 116.06 Dan V 127.32 -1.4
-0.1
Matt 105.04 Tyler 110.04 +1.1
-0.0
Week of 11/25100.0*Chance in playoffs100.0*Average seed
Dan O 125.37 Brian 110.18 -18.2
-1.4
Matt 125.06 Nick 154.62 +3.0
-0.1
Rob 127.66 Drew 113.72 +0.5
+0.1
Tyler 104.73 Cassidy 79.96 -0.4
-0.1
Dan V 121.68 Justin 111.91 -0.4
-0.1
Luke 58.52 Anton 164.02 -0.1
If winner is:HomeTieAway
Week of 12/2100.0*Chance in playoffs100.0*Average seed
Matt vs Brian-27.4InIn
-1.0-0.4+0.8
Luke vs Drew+11.9-1.4-1.4
+0.4+0.1-0.1
Dan V vs Anton+4.6+4.6-8.6
-0.0-0.0+0.1
Tyler vs Justin-0.1-0.1+0.4
Nick vs Cassidy-0.1-0.1+0.3

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-L-Tplayoffs123456789101112Count
81-0-0In0628481843,998,911
7.50-0-1In12881,568,038
70-1-052.9%44940832,873,267
Total:80.2%0316293217378,440,216
Games Above .500
Chance Will Make Playoffs