rewrite the expresion in the form of a division like this
[tex]\frac{\frac{a}{b}}{\frac{c}{d}}=\frac{ad}{bc}[/tex]in this case you can rewrite as
[tex]\frac{\frac{3}{1}}{\frac{2}{5}}[/tex]apply the definition from before
[tex]\frac{\frac{3}{1}}{\frac{2}{5}}=\frac{3\cdot5}{1\cdot2}=\frac{15}{2}[/tex]final answer
[tex]\frac{15}{2}[/tex]