I need to know how to get the answers I’m new to this

Always that we have an integer, let's say 2, we can rewrite it like:
[tex]\frac{2}{1}[/tex]This will help us when multiplying fractions. To multiply two fractions, we simply multiply the numerator with the numerator and denominator with denominator. In this case:
[tex]\begin{gathered} 2\times-\frac{7}{4}=\frac{2}{1}\times-\frac{7}{4}^{} \\ \\ -\frac{2\times^{}7}{1\times4} \end{gathered}[/tex]And then solve:
[tex]-\frac{2\times^{}7}{1\times4}=-\frac{14}{4}[/tex]Now we can further simplify this fraction, because 14 and 4 are divisible by 2, then:
14 = 2 x 7
4 = 2 x 2
Then the final answer is:
[tex]-\frac{7}{2}[/tex]