If 20% of A = 50% of B, then what percent of A is B ?

Here , 20% of A = 50% of B

⇒ 2A = 5B ⇒ A =	5B
	2

Let B is p % of A.

∴	5B	×	p	́ = B
	2		100

⇒ p =	200	= 40%
	5