ANSWER
16
EXPLANATION
We want to find the missing number in the unit rate.
Let the missing number be x.
We have that:
[tex]\frac{48}{3}=\text{ }\frac{x}{1}[/tex]We can find x, by simply dividing 48 by 3.
That is:
[tex]x\text{ = 16}[/tex]Therefore, the missing number is 16.