namely how many times does 2/5 go into 16⅘.
let's first convert the mixed fraction to an improper, and then get their quotient.
[tex] \bf \stackrel{mixed}{16\frac{4}{5}}\implies \cfrac{16\cdot 5+4}{5}\implies \stackrel{improper}{\cfrac{84}{5}}
\\\\\\
\cfrac{84}{5}\div \cfrac{2}{5}\implies \cfrac{84}{5}\cdot \cfrac{5}{2}\implies \cfrac{84}{2}\cdot \cfrac{5}{5}\implies \cfrac{42}{1}\cdot 1\implies 42 [/tex]
