Q: If a person's salary was reduced by 10%, what percentage increase is needed to bring the reduced salary back to the original amount?
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A
(100/9)%
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B
50%
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C
20%
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D
39%
A
Answer:
A
Explanation:
If the original salary was Rs.100 and the new salary is Rs.90,
then the decrease in salary is Rs.10.
The increase on Rs.90 is Rs.10, which is a 10/90 = 11.11% increase.
The increase on Rs.100 is ((10/90)*100)% = (100/9)% = 11.11% increase.
To express the increase as a percentage, you can use the formula:
percent increase = (new value - old value)/old value * 100%
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