Andrew needs 995 tickets to get the price he wants at arcade. He already has 319 tickets and can earn 42 tickets each time he plays an arcade game. How many games do we have to play in order to have enough tickets to win the prize he wants.
Andrew needs 995 - 319 = 676 more tickets to reach his goal.
Thus, Andrew needs to play 676 / 42 = 16 games to earn enough tickets.