Question

Tick (✓) the correct answer:
5% of a number is 9. The number is
(a) 45
(b) 90
(c) 135
(d) 180

Answer 1

(d) 180

$$\begin{gathered} \mathrm{Let}x\mathrm{be}\mathrm{the}\mathrm{required}\mathrm{number}.\mathrm{Then},\mathrm{we}\mathrm{have}: \\ 5\%ofx=9 \\ \Rightarrow \left(x\times \frac{5}{100}\right)=9 \\ \Rightarrow \frac{5x}{100}=9 \\ \Rightarrow x=\left(9\times \frac{100}{5}\right) \\ \Rightarrow x=180 \end{gathered}$$