Four Fourths
Four-fourths can be written 4/4.
Four-fourths of something is a whole or 1.
One and One-Fourth
One and one-fourth can be written as 1 and 1/4.
This is one circle and one-fourth of another circle.
One and One-Half
One and one-half can be written as 1 and 1/2.
This is one circle and one-half of another circle.