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 -20.9
-0.9
Canterbury 18 Illawarra 12 -2.1
-0.1
Newcastle 12 Penrith 23 -2.0
-0.1
Cronulla 32 Canberra 10 +1.7
Souths 24 St George 26 +1.1
+0.1
Manly 8 Balmain 4 +0.2
Week of 8/5100.0*Chance in playoffs100.0*Average seed
Brisbane 24 Newcastle 8 +19.8
+0.6
Canberra 26 Easts 18 -8.6
-0.3
Wests 23 Manly 20 +4.1
+0.2
Balmain 16 Penrith 14 -3.3
-0.0
Illawarra 14 Cronulla 22 -0.9
-0.1
St George 0 Canterbury 26 -0.3
-0.1
Week of 8/12100.0*Chance in playoffs100.0*Average seed
Balmain 20 Brisbane 10 -49.7
-1.3
Gold Coast 4 Canberra 24 -2.3
-0.3
Penrith 4 Manly 18 -0.1
Games Above .500
Chance Will Make Playoffs