Win% represents the percent games played that were won.
Games Won + ( Games Tied × 0.5 ) ) ÷ Games Played = Win%
( 1 + ( 0 × 0.5 ) ) ÷ 4 = 25.0%
SOS1 represents the average of opponents' Win% for each game.
AVERAGE(
33.3%
0.0%
50.0%
42.9%
50.0% ) = 0.440
SOS2 represents the average of opponents' SOS1.
AVERAGE(
0.306
0.647
0.575
0.530
0.539 ) = 0.488
RPI represents the Ratings Percentage Index
( 40% × Win% ) + ( 40% × SOS1 ) + ( 20% × SOS2 ) = RPI
( 40% × 0.250 ) + ( 40% × 0.440 + ( 20% × 0.488 ) = 0.374
( 0.100 ) + ( 0.176 ) + ( 0.098 ) = 0.374