Divide :

1.242 ÷ 1.8

We have:

$\dfrac{1.242}{1.8} = \dfrac{1.242 \times 10}{1.8 \times 10} = \dfrac{12.42}{18}$

On dividing 12.42 by 18, we get:

$\begin{array}{r} 0.69 \ 18 \overline{\smash{)} 12.42 } \ \underline{108\phantom{0}} \ 162 \ \underline{162} \ 0 \phantom{.} \end{array}$

Hence, $\dfrac{1.242}{1.8} = \dfrac{12.42}{18} = 0.69$