mohon bantuannya ya secepatnya

(8^-3/5).(9^5/4) / (81^-1/8).(64^1/5)
= ((2^3)^-3/5).((3^2)^5/4) / ((3^4)^-1/8).((2^6^1/5)
= (2^-9/5) . (3^5/2) / (3^-1/2) . (2^6/5)
= (3^(5/2-(-1/2))) . (2^((-9/5)-(6/5)))
= (3^3) . (2^-3)
= 27 / 8

maaf kalo salah.........