The salary of a worker is first increased by 15% and afterwards reduced by 15%. What is the net change in the worker's salary? Choose the correct answer:
A) 5.25 % increase  B) 5.25 % decrease  C) 2.25 % increase  D) 2.25 % decrease  E) no change

Rationale: "let x be the original salary . the final salary is 0.85 ( 1.15 x ) = 0.9775 x the answer is d ."
Answer: D