How are these numbers calculated?

Big Games

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

Week of 3/30100.0*Chance wins title100.0*Top Four Seed100.0*Average seed
Puck Norris 2 Logan Urology 3 No
+0.4
+0.1
Trashers 2 Big Willies 3 -18.5
-0.8
Pistol Shrimp 0 Moose Knuckles 5 +0.8
Week of 4/6100.0*Chance wins title100.0*Top Four Seed100.0*Average seed
Big Willies 3 Hatrick Kane 0 -1.2
-0.1
Puck Norris 5 Moose Knuckles 3 +0.1
If winner is:HomeAway
Trashers vs Pistol Shrimp+24.6No
+0.5-0.5
Moose Knuckles vs TrashersNo+24.6
-1.0+1.0
Logan Urology vs Ugly Pucklings+0.4-0.4

What If

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

100100100100100100100100
If finish:ChanceTop FourChance will finish season at seed
TPW-Lwins titleSeed12345678Count
202-0No98.5%98210,937,630
181-1NoNo505021,850,321
160-2NoNo10010,939,585
Total:No24.6%250255043,727,536
Points
Chance Will Win Championship