He prefers to travel by one's lonesome.

She added one-drop of vanilla extract to the batter.

I ate one fourth of the pizza.

One third of the students prefer pizza for lunch.

She ate one quarter of the pizza.

I ate one half of the pizza.

I ate one eighth of the cake.

One fifth of the students prefer pizza over burgers.

One sixth of the cake is missing.

He ate one seventh of the cake.