Well, I believe that it's letting you know [tex] \frac{2}{7} [/tex] is simply just a fraction of a full number {1}
For example, You have a pie. Your Mother cut it in 7 slices, if your family ate 5 of the seven slices, there would be how many slices left?
The would be [tex] \frac{2}{7} [/tex] of one whole pie.
So, I hope you find this helpful. :3
