Income of Suman is first increased by 7% and then it is decreased by 7%. What is the change in her income?

0.49% (increase)
0.39% (decrease)
0.39% (increase)
0.49% (decrease)

Correct Answer: 0.49% (decrease)

Explanation:

In such case, there is always decrease.
Given that, a = (common increase or decreased) = 7%
According to the formula,
Decreased Percentage = a²/100 %
= 7²/100 %
= 0.49%

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