How are these numbers calculated?

Big Games

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

Week of 2/12100.0*Chance in playoffs100.0*Average seed
Black 1 Red 9 -1.2
+0.1
Green 3 Light Blue 10 -0.9
Week of 2/19100.0*Chance in playoffs100.0*Average seed
Burgundy 1 Green 2 +16.7
+0.3
Black 1 Gray 7 +14.8
+0.5
Orange 1 White 7 +7.0
+0.2
Light Blue 2 Red 1 -2.1
If winner is:HomeAway
Week of 2/26100.0*Chance in playoffs100.0*Average seed
Gray vs White+33.3-33.3
+0.4-0.4
Orange vs Red-16.6+16.7
-0.1+0.1
Orange vs Burgundy+8.3-8.3
+0.1-0.1

What If

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

100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-Lplayoffs12345678Count
81-091.7%883819,245,976
60-125.0257519,245,512
Total:58.3%4544238,491,488
Games Above .500
Chance Will Make Playoffs