A number is increased by 40 % and then decreased by 40 %. Find the net increase or decrease per cent.	Options
A) 19% B) 18% C) 17% D) 13% E) 16%
Let the number be 100.   Increase in the number = 40 % = 40 % of 100   = (40/100 × 100)   = 40   Therefore, increased number = 100 + 40= 
<gadget id="calculator">100 + 40</gadget>
<output>140</output>
140   This number is decreased by 40 %   Therefore, decrease in number= 40 % of 140   = (40/100 × 140)   = 5600/100= 
<gadget id="calculator">5600/100</gadget>
<output>56</output>
56   Therefore, new number= 140 - 56= 
<gadget id="calculator">140 - 56</gadget>
<output>84</output>
84   Thus, net decreases= 100 - 84= 
<gadget id="calculator">100 - 84</gadget>
<output>16</output>
16   Hence, net percentage decrease= (16/100 × 100) %   = (1600/100)= 
<gadget id="calculator">(1600/100)</gadget>
<output>16</output>
16 %   Answer:16%
<result>E</result>
A number is increased by 40 % and then decreased by 40 %. Find the net increase or decrease per cent.