The last set of worksheets deals with commonly encountered fractions, including percentage values. These are values that students should be able to site reduce when they encounter them. Mastering these reducing problems will make many other fraction problems go much faster.
If you make your own, you can just draw three circles on a page and then 2-5 triangles on a page, and ask the child to match each circle with a triangle by drawing a line from shape to shape. Vary the shapes and the amounts. Sometimes the amounts should be equal, sometimes not.