Tick (✓) the correct answer

(b) 600

Let the required number be $\mathrm{x}$. Then, we have :

$40 \%$ of $x=240$

$\Rightarrow\left(x \times \frac{40}{100}\right)=240$

$\Rightarrow \frac{40 x}{100}=240$

$\Rightarrow x=\left(240 \times \frac{100}{40}\right)$

$\Rightarrow x=600$