How are these numbers calculated?

Big Games

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

Week of 10/21100.0*Chance in playoffs100.0*Average seed
SHS 0 NCHS 8 +31.7
+0.6
HCHS 35 DHHS 36 +2.3
WA 56 LHS 0 -0.9
If winner is:HomeAway
Week of 10/28100.0*Chance in playoffs100.0*Average seed
NCHS vs HCHS+25.5-34.8
+0.7-0.9
EHS vs SHS+0.5-24.2
+0.0-0.4
DHHS vs WA-6.2+0.1
-0.1+0.0

What If

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

100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs1234567Count
42-0In100247,227,342
31-189.4%0583111011,938,363,875
20-228.1424363248,622,581,559
Total:64.1%135282113220,808,172,776
Games Above .500
Chance Will Make Playoffs