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Income of Suman is first increased by 7% and then it is decreased by 7%. What is the change in her income ?
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- 0.49% (increase)
- 0.39% (decrease)
- 0.39% (increase)
- 0.49% (decrease)
- None of the above
Correct Option: D
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%
