The given expression is,
[tex]\frac{2.4}{\square}=-4[/tex]
Let the unknown number be x, Let us divide each term by -4, we get,
[tex]\begin{gathered} \frac{2.4}{-4x}=-\frac{4}{-4} \\ \frac{2.4}{-4x}=\frac{1}{1} \end{gathered}[/tex]
On cross mutiplying, we get,
[tex]\begin{gathered} \frac{2.4}{-4x}=\frac{1}{1} \\ 2.4=-4x \\ x=\frac{2.4}{-4}=-0.6 \end{gathered}[/tex]
Thus, the required number is -0.6.
