Question

a man got a 10% increase on his salary if is new salary is rupees 154000 find its original salary

Answer 1

Let original salary be x
then increment in salary=
$x + x \times \frac{10}{100} \\ x + x \times \frac{1}{10} \\ x + \frac{x}{10} \\ \frac{11x}{10}$
now the salary is 11x/10 but in question it is 154000 so
$\frac{11x}{10} = 154000 \\ = > x = \frac{1540000}{11} \\ = > x = 140000$