If 50% of (P - Q) = 30% of (P + Q) and Q = x% of P, then the value of x is :

Answer: Option B

$$\frac{50}{100}$$(P - Q) = $$\frac{30}{100}$$(P + Q)
5P - 5Q = 3P + 3Q
2P = 8Q
P = 4Q
Put value of P in given equation
Q = P × $$\frac{x}{100}$$
Q = 4Q × $$\frac{x}{100}$$
x = 25
Hence required value of x = 25