Question:
Tick (✓) the correct answer:
5% of a number is 9. The number is
(a) 45
(b) 90
(c) 135
(d) 180
Solution:
(d) 180
Let $x$ be the required number. Then, we have :
$5 \%$ of $x=9$
$\Rightarrow\left(x \times \frac{5}{100}\right)=9$
$\Rightarrow \frac{5 x}{100}=9$
$\Rightarrow x=\left(9 \times \frac{100}{5}\right)$
$\Rightarrow x=180$
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