#### Answer

$\frac{1}{116}$

#### Work Step by Step

We often express ratios as fractions.
If we have 16 math teachers for 1856 math students, we set the ratio this way:
$\frac{16}{1856}$
Next, we divide both the numerator and the denominator by their greatest common factor, which is $16$:
$\frac{1}{116}$
This is the simplest we can make this ratio. It means that there is one math teacher for every 116 math students.