#### Answer

Ans: $\frac{4}{5}$
The ratio of "16 fish to 20" fish can be written as $\frac{4}{5}$ in lowest terms

#### Work Step by Step

16 Fish to 20 Fish.
First Write the ratio and divide the common units:
So, $\frac{16 Fish}{20 Fish} = \frac{16}{20}$
Now find the lowest term
$\frac{16}{20} $
= $\frac{16\div4}{20\div4}$
= $\frac{4}{5}$