In a town,there are 170 teenagers that own portable media players. This at least 2/3 of all teenagers in the town. What is the maximum teenagers who live in the town?
170 is only 2/3 of the teens. So if we divide 170 in half we have 85. 85 plus 85 is 2/3 of the teens 85 plus 85 plus 85 is all of the teens. 85x3 is 255, which means the max of 255 teens in the town.