A unit rate is a ratio used to compare a unit of one quantity to different units of anothe quantity. In a unit rate, one quantity is one unit.
A unit rate compares a quantity to another.
In the real world, a unit rate is very helpful because it allows for direct comparisons. The unit rates help in comparing varying sizes of different quantities by comparing the number of units for one quantity to one unit of another quantity.
Thus, we can say it might be helpful to compare unit rates in the real world because it helps in knowing the varying prices of different commodities(units) that have the same value.