A shopkeeper wants to make a minimum net profit of 5% on a pair of jeans she is selling, which she bought for $100. If originally, she was selling the pair at 20% gain, what is the largest discount she can allow? Choose the most appropriate option:
A) 12.5%
B) 8%
C) 8.3%
D) 15%
E) 4%
A   If she bought the jeans at $100, she is currently selling them at  (120/100)*100= 
<gadget id="calculator"> (120/100)*100</gadget>
<output>120</output>
$120.   She wants to make a profit of 5%, which means she needs to sell them at (105/100)*100= 
<gadget id="calculator">(105/100)*100</gadget>
<output>105</output>
$105   The max discount she can allow is thus ((120-105)/120)*100= 
<gadget id="calculator">((120-105)/120)*100</gadget>
<output>25/2 = around 12.5</output>
12.5%
<result>A</result>
A shopkeeper wants to make a minimum net profit of 5% on a pair of jeans she is selling, which she bought for $100. If originally, she was selling the pair at 20% gain, what is the largest discount she can allow?