Description: Sal uses fractions to name parts of a whole. Created by Sal Khan. I have a square here divided into one, two, three, four, five, six, seven, eight, nine equal sections. And we've already seen that if we were to shade in one of these sections, if we were to select one of these sections, let's say the middle one right over here, this is one out of the nine equal sections. This thing right over here represents 1/9.*Teacher Advisor is 100% free.