Answer:
3/28
Step-by-step explanation:
Set them up like this:
[tex]\frac{1}{5}*\frac{3}{4}*\frac{5}{7}[/tex]
and the 5's cancel each other out, leaving you with
[tex]\frac{1}{1}*\frac{3}{4}*\frac{1}{7}[/tex]
Multiply straight across the top and straight across the bottom to get
[tex]\frac{1}{1} *\frac{3}{4} *\frac{1}{7} =\frac{3}{28}[/tex]
When you reduce as much as possible before multiplying, the answer will automatically be in its reduced form.