John want to buy a $100 Trouser at the store, but he think itâ€™s too expensive. Finally, it goes on sale for $80. What is the percent decrease?
Choose the correct choice from the following choices:	A) 20%	B) 30%	C) 40%	D) 50%	E) 60%
The is always the difference between our starting and ending points. In this case, itâ€™s 100 â€“ 80 = 20. The â€œoriginalâ€ is our starting point; in this case, itâ€™s 100. (20/100)*100 = (0.2)*100= 
<gadget id="calculator">(0.2)*100</gadget>
<output>20</output>
20%.   20%
<result>A</result>
John want to buy a $100 Trouser at the store, but he think itâ€™s too expensive. Finally, it goes on sale for $80. What is the percent decrease?