If your question is like this
[tex] \frac{5}{8m} =25[/tex]
then first you should reverse the sides, right to left, left to right
[tex]25= \frac{5}{8m} [/tex]
Move 8m to the left side. Because in the right side 8m is denominator, after moved to the left side it become the numerator
[tex] 25(8m)=5[/tex]
Simplify
[tex]200m = 5[/tex]
Move 200 to the right side. Because in the left side 200 is numerator, after moved to the right side it become the denominator
[tex]m = \frac{5}{200}[/tex]
