Answer:
If the season has 80 games, we have played 60 games so far, meaning we have 20 games left. So far, we have won 45% of the 60 games, which is 27 games. To finish the 80-game season with the same number of wins as losses (40 wins and 40 losses), we must win 13 of the remaining 20 games, or 65% of the remaining 20 games.