Question

Mark (✓) against the correct answer:
5% of which number is 12?
(a) 120
(b) 180
(c) 240
(d) 320

Answer 1

(c) 240

$$\begin{gathered} \mathrm{Let}\mathrm{the}\mathrm{required}\mathrm{number}\mathrm{be}\mathrm{x}.\mathrm{Then},\mathrm{we}\mathrm{have}: \\ \left(5\%\mathrm{of}\mathrm{x}\right)=12 \\ \Rightarrow \left(\mathrm{x}\times \frac{5}{100}\right)=12 \\ \Rightarrow \frac{5\mathrm{x}}{100}=12 \\ \Rightarrow \mathrm{x}=\left(12\times \frac{100}{5}\right) \\ \Rightarrow \mathrm{x}=240 \end{gathered}$$