Question 222786
I feel gutsy in pointing out that I think Dr. J made a mistake above. 

The question asks for "percent of games that the team played did it lose?" If the team won 30 and lost 10, then it played 40 games. 

Lost: 10
Played: 10+30 = 40

Lost/Played: 10/40 = 1/4 =.25

The team lost 25% of the games that it played.