If the salary of an employee is reduced by 10 percent for his late attendance and then increased by 10 percent on a pardon, how much does he lose?

A 2

B 1

C 1/2

D 9

Correct Answer: Option B

At 10% decrease, salary is = 100 - 10 = 90
And a 10% increase, the salary is = 90 + 90×10/100 = 99
∴ He is at = 100 - 99 = 1% loss