Question : A person's salary increased from INR 8,100 to INR 9,000. What is the percentage increase in his salary?
Option 1: $9 \frac{1}{9} \%$
Option 2: $13 \frac{7}{9} \%$
Option 3: $11 \frac{1}{9} \%$
Option 4: $6 \frac{1}{9} \%$
Correct Answer: $11 \frac{1}{9} \%$
Solution :
Initial salary = INR 8100
Increased salary = INR 9000
Percentage increased =$\frac{\text{Initial salary} - \text{Increased salary}}{\text{Initial salary}} \times 100$
So, the required percentage
= $\frac{9000 - 8100}{8100} \times 100$
= $\frac{900}{8100} \times 100$
= $\frac{100}{9} \%$
= $11 \frac{1}{9} \%$
$\therefore$ The percentage increase in his salary is $11 \frac{1}{9} \%$
Hence, the correct answer is $11 \frac{1}{9}\%$.
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