Answer:
Option B
Explanation:
Let the required fraction be $\frac{x}{y}$
Resultant fraction = $\frac{x+\left(x \times \frac{140}{100}\right)}{100} \div \frac{y+\left(y \times \frac{150}{100}\right)}{100}$
$=\frac{4}{15}$
$\frac{x}{y} = \left(\frac{4}{15}\right)\times \left(\frac{25}{24}\right)$
$= \frac{5}{18}$