Can someone help me please

Answer:
Option A
Step-by-step explanation:
To simplify this fraction:
We subtract the powers:
[tex]\frac{6^{3} }{6^{6} } = 6^{3-6}[/tex]
[tex]6^{-3}[/tex] = [tex]\frac{1}{6^{3} }[/tex] = 1/216
These answers I wrote in the last line are options B,C and D.
Therefore Option A is not equivalent.