How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Friday100.0*Average seed
Dynasty 1 Gladiators 3 +0.5
Saturday100.0*Average seed
Mayhem 0 Uprising 4 -0.5
Spitfire 1 Fusion 3 +0.5
Games Above .500
Chance Will Make Playoffs