If the cost price of 140 pencils is equal to the selling price of 100 pencils, the gain percent is Choices: A) 36 B) 37 C) 38 D) 39 E) 40
Let C.P. of each pencil be Re. 1.   Then, C.P. of 100 pencils = Rs. 100; S.P. of 100 pencils = Rs. 140.   Gain % = 40/100 * 100= 
<gadget id="calculator">40/100 * 100</gadget>
<output>40</output>
40%   Answer:40
<result>E</result>
If the cost price of 140 pencils is equal to the selling price of 100 pencils, the gain percent is