Question

the salary of a person was increased by 15%. If his salary now is rupees 9936 what was his initial salary?

Answer 1

His initial salary was 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