I found a fifty-cent coin on the ground.

I found fifty cents on the ground.

I found fifty-cents on the ground.

I found a fifty cent coin on the ground.

I went on several fifty-cent tours during my vacation.

I took a fifty-cent tour of the city.

The fifty-cent army is a group of internet users who are paid to spread propaganda.

The fifty cent army is a group of internet users who are paid to spread propaganda.