a man buys an article for $ 100. and sells it for $ 125. find the gain percent? Choose the correct choice:  A) 10 %  B) 15 %  C) 25 %  D) 20 %  E) 30 %
<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">125 / 1</gadget>
<output>125</output>

<gadget id="calculator">125 - 100</gadget>
<output>25</output>

<result>C</result>
a man buys an article for $ 100. and sells it for $ 125. find the gain percent?
subtract(divide(125, divide(100, const_100)), const_100)
"c . p . = $ 100 s . p . = $ 125 gain = $ 25 gain % = 25 / 100 * 100 = 25 % answer is c"