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
Laurel 104.68 Ethan 100.76 +10.2
+0.7
Tom H 81.9 Shara 100.3 +2.5
+0.1
Justin 73 Riley 130.16 +2.1
+0.1
Jenn 121.52 Dave 114.46 -0.2
+0.1
Eric 95.94 Tom K 95.72 +0.1
+0.1
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Justin 80.66 Laurel 101.48 +20.3
+1.1
Jenn 100.28 Tom K 107.62 -14.4
-0.3
Erica 104.54 Tom H 64.7 +3.8
+0.1
If winner is:HomeAway
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Tom H vs LaurelOut+35.5
-2.6+1.9
Justin vs Tom K-7.2+9.7
-0.6+0.8
Jenn vs Riley-5.4+9.7

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
81-083.1%7491717,287,397
70-1Out267412,912,819
Total:47.6%425213230,200,216
Games Above .500
Chance Will Make Playoffs