ab² per c dibagi b per ac

(ab² / c) ÷ ( b / ac)
=( ab² / c) × (ac / b)
= (ab²)(ac)
-----------------
c . b
= a²b²c
-------------
bc
= ab

AB^2/C AB^2. AC
———. =. ——. X. ——
B/AC. C. B
A^2 B^2 C
= —————
CB
=A^2 B