The salary of a worker is first increased by 10% and afterwards reduced by 10%. What is the net change in the worker's salary?
Options:
A) 1 % increase
B) 1 % decrease
C) 2 % increase
D) 2 % decrease
E) no change

Rationale: "let x be the original salary . the final salary is 0.9 ( 1.1 x ) = 0.99 x the answer is b ."
Answer: B