conversations.from: human
conversations.value: Last week, the price of a movie ticket was $100. This year the price is down by 20%. What's the new price of the movie ticket?
  What is the solution?
conversations.from: assistant
conversations.value: The price of the book is down by: 100*0.2 = $20.
  So the new price of the movie ticket is: 100 - 20 = $80.