Use some thinking to answer the following question. The salary of a worker is first increased by 30% and afterwards reduced by 30%. What is net change in his salary?
Options:
(A) 90% increase
(B) 45% increase
(C) 9% decrease
(D) Same as before
(E) NONE
(30 * 30)/100 = 9% decrease So the final answer is (D).