a customer bought a product at the shop. however, the shopkeeper increased the price of the product by 20 % so that the customer could not buy the required amount of the product. the customer managed to buy only 80 % of the required amount. what is the difference in the amount of money that the customer paid for the second purchase compared to the first purchase? Pick
A) 10 %
B) 8 %
C) 6 %
D) 4 %
E) 2 %
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) + 1</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(6/5) * (4/5)</gadget>
<output>24/25 = around 0.96</output>

<gadget id="calculator">1 - (24/25)</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">(1/25) * 100</gadget>
<output>4</output>

<result>D</result>
a customer bought a product at the shop. however, the shopkeeper increased the price of the product by 20 % so that the customer could not buy the required amount of the product. the customer managed to buy only 80 % of the required amount. what is the difference in the amount of money that the customer paid for the second purchase compared to the first purchase?
multiply(subtract(const_1, multiply(add(divide(20, const_100), const_1), divide(80, const_100))), const_100)
"let x be the amount of money paid for the first purchase . the second time , the customer paid 0.8 ( 1.2 x ) = 0.96 x . the difference is 4 % . the answer is d ."