8x4 / 2y2 z Multiplied by 5yz2 / 12x3 z
Multipy the numerators
( 8x4) (5yz2) = 8*5x4yz2 = 40x4yz2 (1)
Multiply the denominators
(2y2z) (12x3z) = 2*12 * y2 * x3 * z * z = 24y2x3z2 (2)
Put (1) over (2)
40x4yz2 40 x4 y z2 5x
________ = __ __ __ ___ = ___
24y2x3z2 24 x3 y2 z2 3y