If 80% of A = 50% of B and B = x% of A, then the value of x is :

Answer: Option C

80% of A = 50% of B
⇒ $$\frac{80}{100}$$A = $$\frac{50}{100}$$B
⇒ 8A = 5B
⇒ A = $$\frac{5}{8}$$B
Put value of A in given equation,
B = x% of A
⇒ B = $$\frac{x}{100}$$ × $$\frac{5}{8}$$B
⇒ x = $$\frac{100\times 8}{5}$$
⇒ x = 160