Question:
Salary of a person is first increased by 20%, then it is decreased by 20%. Percentage change in his salary is :
A4% decreased
B4% increased
C8% decreased
D20% increased
Answer:
A. 4% decreased
Explanation:
If the value of a number is first increased then decreased by x%, then net change is always a decrease which is equal to [x^2/100]% Hence, Required change in salary=(20)^2/100=4% Decrease