How are these numbers calculated?

Big Games

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

Week of 7/29100.0*Chance in playoffs100.0*Average seed
Parramatta 22 Brisbane 14 +1.8
+0.1
Souths 24 St George 26 -1.7
-0.3
Cronulla 32 Canberra 10 +0.5
Canterbury 18 Illawarra 12 -0.3
Manly 8 Balmain 4 -0.2
Newcastle 12 Penrith 23 -0.1
Week of 8/5100.0*Chance in playoffs100.0*Average seed
Brisbane 24 Newcastle 8 Out
-0.0
Balmain 16 Penrith 14 -0.1
Souths 14 Gold Coast 14 -0.0
Week of 8/12None
Games Above .500
Chance Will Make Playoffs