well, first off let's get the difference from 66 million to 8000, 66,000,000 - 8000 = 65992000.
Now, if we take the latter number to be the 100%, say if 8000 is 100%, how much is 65992000 off of it in percentage?
[tex]\begin{array}{ccll} amount&\%\\ \cline{1-2} 8000&100\\ 65992000&x \end{array}\implies \cfrac{8000}{65992000}=\cfrac{100}{x}\implies \cfrac{1}{8249}=\cfrac{100}{x} \implies x = 824900[/tex]
or namely 65992000 is 824,900% of 8000.
