How are these numbers calculated?

Big Games

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

Week of 8/17100.0*Chowder Cup100.0*Average seed
Hogs 3 Steamers 2 +17.8
RustyBlades 1 ScreaminSeagulls 9 No
Falcons 3 MorleysDog 3 +0.2
Week of 8/25None
Week of 9/2None
Chance Will Make Playoffs