Salary of a person is first increased by 20%, then it is decreased by 20%. Percentage change in his salary is : Options: A . &nbsp4% increased B . &nbsp20% increased C . &nbsp8% decreased D . &nbsp4% decreased

Salary of a person is first increased by 20%, then it is decreased by 20%. Perce

Question

Salary of a person is first increased by 20%, then it is decreased by 20%. Percentage change in his salary is :

Options:

A . 4% increased

B . 20% increased

C . 8% decreased

D . 4% decreased

Answer: Option D
Answer: (d)
Using Rule 4,
"If a number is increased by a% and then it is decreased by b%, then resultant change in percentage will be"
$(a - b - {ab}/100)$%

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