Question

A high school basketball team won 40% of its first 15 games. beginning with the 16th game, how many games in a row does the team now have to win in order to have a 55% winning record?

Answer 1

  If the team won 40% of its first 15 games then the number of the winning games was:  15 * 0.4 = 6. Therefore the team lost 15 - 6 = 9 games.
  So the number of the lost games stays the same while the team wins new games in the row. They have to achieve 55% wins, so 100% - 55% = 45% is the new percent of lost games.
  x * 0.45 = 9
  x = 9 : 0.45
  x = 20
  20 - 15 = 5
  Answer: The team have to win 5 games in a row in order to have 55%
 winning record.