Question

the salary of a person was increased by 15 %. if his salary now is Rs 9936, what was his initial salary?

Answer 1

Let the original salary was x

Salary increased by 15% = x + 15% of x

x + 15% of x = 9936

x + 15/100x = 9936

115x/100 = 9936

115x = 993600

x = 993600/115

x = 8640

Hence his initial salary was rs. 8640.

Answer 2

$\huge\purple{\fbox{\fbox{\red{\mathcal{solution}}}}}$

let the initial salary be X

$x + 15\% \: of \: x = 9936$

$= > \frac{x}{1} \times \frac{100}{100} + \frac{15}{100} \times x = 9936$

$= > \frac{100x + 15x}{100} = 9936$

$= > \frac{115x}{100} = 9936$

$= > x = 9936 \times \frac{100}{115}$

$= > x = 9936 \times \frac{20}{23}$

$= > x = 432 \times 20$

$= > x = 8640(ans)$

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hope this helps you xD