Question

How do you find the unit rate of a 12-oz bottle of orange juice that sells for $1.29?

Answer 1

By "unit rate" I assume you mean cost per ounce.

The ratio can be expressed as a fraction:
cost / volume

`($1.29)/(12 oz)`

`= ($0.1075)/(1 oz)`

or `10 3/4` cents per ounce.