if 20 liters of chemical x are added to 80 liters of a mixture that is 25 % chemical x and 75 % chemical y, then what percentage of the resulting mixture is chemical x?
Choose one:	A) 28 %	B) 32 %	C) 36 %	D) 40 %	E) 44 %
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 80</gadget>
<output>20</output>

<gadget id="calculator">20 + 20</gadget>
<output>40</output>

<result>D</result>
if 20 liters of chemical x are added to 80 liters of a mixture that is 25 % chemical x and 75 % chemical y, then what percentage of the resulting mixture is chemical x?
add(20, multiply(divide(25, const_100), 80))
the amount of chemical x in the solution is 20 + 0.25 ( 80 ) = 40 liters . 40 liters / 100 liters = 40 % the answer is d .