The fraction

1/4
is shaded in the diagram below. Divide

1/4 into 4 equal parts. What is the size of each part?

A number line from zero to one, marked every one-fourth. From zero to one-fourth is shaded and split evenly into four equal increments.

To divide the fraction 1/4 into 4 equal parts, we need to divide the shaded portion into 4 equal increments.

The size of each part will be the result of dividing 1/4 by 4.

(1/4) / 4 = 1/16

Therefore, the size of each part is 1/16.