A number is increased by 60 % and then decreased by 60 %. Find the net increase or decrease per cent.
Choose the correct choice from the following options:  A) 19%  B) 18%  C) 27%  D) 33%  E) 36%
Let the number be 100.   Increase in the number = 60 % = 60 % of 100   = (60/100 Ã— 100)   = 60   Therefore, increased number = 100 + 60= 
<gadget id="calculator">100 + 60</gadget>
<output>160</output>
160   This number is decreased by 60 %   Therefore, decrease in number= 60 % of 160   = (60/100 Ã— 160)   = 9600/100= 
<gadget id="calculator">9600/100</gadget>
<output>96</output>
96   Therefore, new number= 160 - 96= 
<gadget id="calculator">160 - 96</gadget>
<output>64</output>
64   Thus, net decreases= 100 - 64= 
<gadget id="calculator">100 - 64</gadget>
<output>36</output>
36   Hence, net percentage decrease= (36/100 Ã— 100) %   = (3600/100)= 
<gadget id="calculator">(3600/100)</gadget>
<output>36</output>
36 %   Answer:36%
<result>E</result>
A number is increased by 60 % and then decreased by 60 %. Find the net increase or decrease per cent.