John want to buy a $100 Trouser at the store, but he think itâ€™s too expensive. Finally, it goes on sale for $55. What is the percent decrease?
Options
A) 20%	B) 30%	C) 40%	D) 50%	E) 45%
The is always the difference between our starting and ending points. In this case, itâ€™s 100 â€“ 55 = 45. The â€œoriginalâ€ is our starting point; in this case, itâ€™s 100. (45/100)*100 = (0.45)*100= 
<gadget id="calculator">(0.45)*100</gadget>
<output>45</output>
45%.   45%
<result>E</result>
John want to buy a $100 Trouser at the store, but he think itâ€™s too expensive. Finally, it goes on sale for $55. What is the percent decrease?