How much 50% of 56 is greater than 30% of 50? Choose the correct choice from the following answers:	A) 18	B) 99	C) 13	D) 55	E) 71

Rationale: "( 50 / 100 ) * 56 – ( 30 / 100 ) * 50 28 - 15 = 13 answer : c"
Answer: C