when the price of an article was reduced by 25 % its sale increased by 80 %. what was the net effect on the sale? Choose the correct choice from the following options.
A) 35 % increase B) 44 % decrease C) 60 % increase D) 66 % increase E) 66 % decrease
<gadget id="calculator">80 + 100</gadget>
<output>180</output>

<gadget id="calculator">100 - 25</gadget>
<output>75</output>

<gadget id="calculator">180 * 75</gadget>
<output>13_500</output>

<gadget id="calculator">13_500 / 100</gadget>
<output>135</output>

<gadget id="calculator">135 - 100</gadget>
<output>35</output>

<result>A</result>
when the price of an article was reduced by 25 % its sale increased by 80 %. what was the net effect on the sale?
subtract(divide(multiply(add(80, const_100), subtract(const_100, 25)), const_100), const_100)
"if n items are sold for $ p each , revenue is $ np . if we reduce the price by 25 % , the new price is 0.75 p . if we increase the number sold by 80 % , the new number sold is 1.8 n . so the new revenue is ( 0.75 p ) ( 1.8 n ) = 1.35 np , which is 1.35 times the old revenue , so is 35 % greater . answer : a"