Multiply the number of ties by 0.5. For example, if the team's record is 50 wins, 28 losses and 30 ties, multiply 30 by 0.5 to get 15.
Add the number of wins the team has to the Step 1 result. In this example, add 15 to 50 to get 65.
Add the team's number of wins, losses and ties to find the total number of games played. In this example, add 50 plus 28 plus 30 to get 108.
Divide the number of wins plus half the number of ties by the number of total games to find the winning percentage. In this example, divide 65 by 108 to find the winning percentage equals 0.6018, or 60.18 percent.