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
Cronulla 32 Canberra 10 +13.1
+1.1
Canterbury 18 Illawarra 12 -1.1
-0.2
Parramatta 22 Brisbane 14 +0.6
+0.1
Newcastle 12 Penrith 23 -0.4
-0.2
Manly 8 Balmain 4 -0.1
-0.0
Week of 8/5100.0*Chance in playoffs100.0*Average seed
Canberra 26 Easts 18 -2.0
-0.1
Illawarra 14 Cronulla 22 In
+0.8
Wests 23 Manly 20 +0.8
+0.2
Brisbane 24 Newcastle 8 -0.7
-0.1
St George 0 Canterbury 26 -0.2
-0.2
Balmain 16 Penrith 14 -0.1
+0.1
Week of 8/12100.0*Chance in playoffs100.0*Average seed
Cronulla 16 St George 14 +0.5
Canterbury 14 Souths 18 +0.3
Penrith 4 Manly 18 +0.2
Games Above .500
Chance Will Make Playoffs