A baseball card decreased in value 10% in its first year and 10% in its second year. What was the total percent decrease of the card's value over the two years? Choices:
A) 19%  B) 30%  C) 32%  D) 36%  E) 72%
consider the initial value of the baseball card as $100   19%fter first year price = 100*0.9= 
<gadget id="calculator">100*0.9</gadget>
<output>90</output>
90   19%fter second year price= 90 *0.9= 
<gadget id="calculator">90 *0.9</gadget>
<output>81</output>
81   final decrease= [(100 - 81)/100] * 100 = 19%   correct answer - 19%(100 - 81)/100  * 100= 
<gadget id="calculator">(100 - 81)/100  * 100</gadget>
<output>19</output>
19%   correct answer - 19%
<result>A</result>
A baseball card decreased in value 10% in its first year and 10% in its second year. What was the total percent decrease of the card's value over the two years?