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 price of the book is down by: 100*0.2 = $
<gadget id="calculator">100*0.2</gadget>
<output>20</output>
20.
So the new price of the movie ticket is: 100 - 20 = $
<gadget id="calculator">100-20</gadget>
<output>80</output>
80.

<result>80</result>