Alright, so...
[tex] \frac{8m}{14(m+n)} [/tex]
Like before, multiply 14 to m+n.
[tex] \frac{8m}{14m+14n} [/tex]
Both the top and bottom will be divided by two, since they cannot cancel out any of the letters (you have to have both m/n in all 3 of the numbers/letters)
So,
Your answer:
[tex] \frac{4m}{7m+7n} [/tex]
