pake cara ya ,makasi:)

[tex] m^{15/8} : m^{20/5} [/tex]
= [tex] m^{15/8 - 20/5}
 = m^{15/8 - 5}
= m^{ \frac{15-5*8}{8}}
= m^{ \frac{-25}{8}} [/tex]