Given the rationale, provide a reasonable question and answer. Step-by-step reasoning process: The price of the book is down by: 100 * 0.2 = $20. So the new price of the movie ticket is: 100 - 20 = $80.
 The question and answer:
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?
The answer is 80