How are these numbers calculated?

Big Games

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

Week of 11/23100.0*Chance in playoffs100.0*Average seed
Isaac 75 Jake 86 -23.5
-0.9
Aunt Sandy 88 Uncle Dave 59 +12.6
+0.3
Nonnie 41 Aunt Dar 100 +2.4
+0.1
Graham 98 Uncle Rodney 111 -0.5
Kara 53 Poppa 95 -0.2
-0.1
Spencer 92 Uncle Scott 37 +0.2
+0.0
Week of 11/30100.0*Chance in playoffs100.0*Average seed
Isaac 48 Poppa 106 Out
-1.1
Nonnie 86 Jake 93 -10.9
Spencer 106 Uncle Dave 129 -3.6
-0.4
Kara 106 Uncle Scott 93 +0.4
+0.0
Graham 138 Aunt Sandy 113 +0.2
If winner is:HomeAway
Week of 12/7100.0*Chance in playoffs100.0*Average seed
Isaac vs Uncle Scott+1.0-1.4
Nonnie vs Poppa+0.3-0.3

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
51-0Out455539,720,166
40-1Out10028,428,834
Total:Out26324268,149,000
Games Above .500
Chance Will Make Playoffs