Answer:
Step-by-step explanation:
According to the order of operations, you need to take care of what's inside the () first. Do this by flipping the second fraction upside down and then multiplying it by the first one:
[tex]\frac{1}{10}*\frac{5}{2}=\frac{5}{20}=\frac{1}{4}[/tex]
Now you have
[tex]\frac{1}{4} -\frac{3}{4}=-\frac{2}{4}=-\frac{1}{2}[/tex]
