The price of a mobile was increased by 40 percent. The new price was then decreased by 15 percent. A single increase of what percent is equivalent to these two successive changes?  Select:
A) 25%
B) 19%
C) 30%
D) 22.5%
E) 15%
consider base price - $100   25% increase = 1.40*100= 
<gadget id="calculator">1.40*100</gadget>
<output>140</output>
$140   Then a 15% decrease on new price= 0.85* 140= 
<gadget id="calculator">0.85* 140</gadget>
<output>119</output>
$119   so final price of radio - $119   therefore a 19% increase   correct option - 19%
<result>B</result>
The price of a mobile was increased by 40 percent. The new price was then decreased by 15 percent. A single increase of what percent is equivalent to these two successive changes?