Answer
$-0.15$
Work Step by Step
To find the decimal notation of $-\dfrac{3}{20}$.
Firstly write $20$ in the form of two factors including $10$.
$-\dfrac{3}{2\cdot10}$
Now divide $3$ by $2$.
We get, $-\dfrac{1.5}{10}$
Since there is $10$ in the denominator, the decimal will move to the left for once.
So, we get the decimal notation as follows:
$-0.15$
