Musicians often use circles of fifths to understand key relationships.

The circle of fifths is a useful tool for understanding key relationships in music.

The fifth quarter of the animal is often used for making sausages and other cured meats.

My fifth cousin is coming to visit next week.

The fraction three fifths represents 3/5.

Four fifths of the students passed the exam.

One fifth of the students prefer pizza over burgers.

Two fifths of the students in the class are from different countries.

Three-fifths of the pizza was eaten by John.

I ate one-fifth of the pizza.