Answer: [tex]-\frac{9}{10}\quad \left(\mathrm{Decimal:\quad }\:-0.9\right)[/tex]
Step-by-step explanation:
[tex]3\frac{1}{2}-4\frac{2}{5}[/tex]
[tex]=\frac{7}{2}-4\frac{2}{5}[/tex]
[tex]=\frac{7}{2}-\frac{22}{5}[/tex]
[tex]=\frac{35}{10}-\frac{44}{10}[/tex]
[tex]=\frac{35-44}{10}[/tex]
[tex]=\frac{-9}{10}[/tex]
[tex]=-\frac{9}{10}[/tex]
