Find :

2.7 is what percent of 18 ?

Let 2.7 be $x\%$ of 18

Hence,

$x$% of 18 = 2.7

⇒ $\dfrac{x}{100} \times 18 = 2.7$

⇒ $\dfrac{18x}{100} = \dfrac{27}{10}$

⇒ $x = \dfrac{27 \times 100}{10 \times 18}$

⇒ $x = \dfrac{2,700}{180}$

⇒ $x$ = 15 %

2.7 is 15% of 18.