Win% represents the percent games played that were won.
Games Won + ( Games Tied × 0.5 ) ) ÷ Games Played = Win%
( 1 + ( 0 × 0.5 ) ) ÷ 5 = 20.0%
SOS1 represents the average of opponents' Win% for each game.
AVERAGE(
63.6%
81.8%
58.3%
54.5%
50.0% ) = 0.589
SOS2 represents the average of opponents' SOS1.
AVERAGE(
0.464
0.353
0.593
0.325
0.395 ) = 0.426
RPI represents the Ratings Percentage Index
( 40% × Win% ) + ( 40% × SOS1 ) + ( 20% × SOS2 ) = RPI
( 40% × 0.200 ) + ( 40% × 0.589 + ( 20% × 0.426 ) = 0.401
( 0.080 ) + ( 0.236 ) + ( 0.085 ) = 0.401