prompt: 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?
messages.content: 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?
messages.role: user
messages.content: The price of the book is down by: 100*0.2 = $<<100*0.2=20>>20.
  So the new price of the movie ticket is: 100 - 20 = $<<100-20=80>>80.
  #### 80
messages.role: assistant