if 40 % of ( x - y ) = 20 % of ( x + y ), then what percent of x is y? Pick:	A) 50.5 %	B) 44.4 %	C) 22.2 %	D) 33.3 %	E) 25 %
<gadget id="calculator">40 - 20</gadget>
<output>20</output>

<gadget id="calculator">40 + 20</gadget>
<output>60</output>

<gadget id="calculator">20 / 60</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 100</gadget>
<output>100/3 = around 33.333333</output>

<result>D</result>
if 40 % of ( x - y ) = 20 % of ( x + y ), then what percent of x is y?
multiply(divide(subtract(40, 20), add(40, 20)), const_100)
"40 % of ( x - y ) = 20 % of ( x + y ) 40 / 100 ( x - y ) = 20 / 100 ( x + y ) x = 3 y required percentage = y / x * 100 = y / 3 y * 100 = 33.3 % answer is d"