Positive integer y is 50 percent of 50 percent of positive integer x, and y percent of x equals 25. What is the value of x?	Choices.
A) 25	B) 50	C) 75	D) 100	E) 125
y = 0.5*0.5*x = x/4   y%*x = 25   (y/100)*x = 25   (x/400)*x = 25   x^2 = 25*400   x = 100   The answer is 100.
<result>D</result>
Positive integer y is 50 percent of 50 percent of positive integer x, and y percent of x equals 25. What is the value of x?