A number is increased by 50 % and then decreased by 50 %. Find the net increase or decrease per cent.	Options:	A) 25%	B) 18%	C) 17%	D) 13%	E) 16%
Let the number be 100.   Increase in the number = 50 % = 50 % of 100   = (50/100 Ã— 100)   = 50   Therefore, increased number = 100 + 50= 
<gadget id="calculator">100 + 50</gadget>
<output>150</output>
150   This number is decreased by 50 %   Therefore, decrease in number= 50 % of 150   = (50/100 Ã— 150)   = 7500/100= 
<gadget id="calculator">7500/100</gadget>
<output>75</output>
75   Therefore, new number= 150 - 75= 
<gadget id="calculator">150 - 75</gadget>
<output>75</output>
75   Thus, net decreases= 100 - 75= 
<gadget id="calculator">100 - 75</gadget>
<output>25</output>
25   Hence, net percentage decrease= (25/100 Ã— 100) %   = (2500/100)= 
<gadget id="calculator">(2500/100)</gadget>
<output>25</output>
25 %   25%nswer:25%
<result>A</result>
A number is increased by 50 % and then decreased by 50 %. Find the net increase or decrease per cent.