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
Aunt Sandy 88 Uncle Dave 59 +9.0
+0.2
Nonnie 41 Aunt Dar 100 -7.5
-0.3
Isaac 75 Jake 86 +2.8
Graham 98 Uncle Rodney 111 +1.3
+0.0
Kara 53 Poppa 95 -0.3
-0.1
Spencer 92 Uncle Scott 37 -0.1
+0.0
Week of 11/30100.0*Chance in playoffs100.0*Average seed
Nonnie 86 Jake 93 Out
-0.9
Spencer 106 Uncle Dave 129 -8.5
-0.1
Isaac 48 Poppa 106 +3.4
+0.2
Graham 138 Aunt Sandy 113 -1.1
-0.0
Kara 106 Uncle Scott 93 +0.0
If winner is:HomeAway
Week of 12/7100.0*Chance in playoffs100.0*Average seed
Isaac vs Uncle Scott-0.4+0.5
Nonnie vs Poppa+0.5-0.4

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456789101112Count
51-0Out425830,845,491
40-1Out10037,303,509
Total:Out198168,149,000
Games Above .500
Chance Will Make Playoffs