A certain article of clothing was discounted during a special sale to 2/5 of its original retail price. When the clothing didn't sell, it was discounted even further to 1/2 of its original retail price during a second sale. By what percent did the price of this article of clothing decrease from the first sale to the second sale? Choose the correct choice from the following options: A) 50% B) 33.33% C) 25% D) 16.66% E) 12.5%
Say the original retail price of the item was $200.   The price after the first sale = 3/5 * $200 = $120.   The price after the second sale 3/5 *  200= 
<gadget id="calculator">3/5 *  200</gadget>
<output>120</output>
$120.   The price after the second sale= 1/2 * $200 = $100.   The percent change from the first sale to the second 1/2 *  200= 
<gadget id="calculator">1/2 *  200</gadget>
<output>100</output>
$100.   The percent change from the first sale to the second= (120 - 100) / 120 = 1/3 = 16.66%.   Answer: 16.66%.
<result>D</result>
A certain article of clothing was discounted during a special sale to 2/5 of its original retail price. When the clothing didn't sell, it was discounted even further to 1/2 of its original retail price during a second sale. By what percent did the price of this article of clothing decrease from the first sale to the second sale?