conversations.from: human
conversations.value: I'm completely lost with this math problem: There are 400 students in a local high school. 50 percent are freshmen or sophomores.  1/5 of freshmen and sophomores own a pet.  How many freshmen and sophomores do not own a pet?
  Can you give me a hand?
conversations.from: assistant
conversations.value: Freshman/Sophomores:400(.50)=200 students
  Have pets:200/5=40 students
  200-40=160 do not have pets