Unit Rate
It measures how much one quantity varies with respect to another.
We are interested in calculating the unit rate that measures the number of kilometers that Bandile's large truck uses by liter of fuel. It's called the efficiency.
We calculate the unit rate as the division of both quantities. The truck uses 20 liters per 100 kilometers. The efficiency is:
![e=\frac{100\operatorname{km}}{20lt}=5\frac{\operatorname{km}}{lt}]()
The efficiency of Bandile's large truck is 5 km per liter