Two-Fourths
Two-fourths can be written 2/4.
If you cut a circle into four equal parts and you have two of them, then you have two-fourths.
One-Half
One-half can be written as 1/2.
Two-fourths is the same as one half.
Three-Fourths
Three-fourths can be written as 3/4.
Three-fourths of this circle is red. One-fourth is white.