Answer: Two-third of the jar is filled with flour.
Step-by-step explanation: Given that a jar can hold of a pound of flour and Austin empties of a pound of flour into the jar.
We are to find the fraction of the jar that is filled.
The quantity of the flour that the jar can hold is given by
and the quantity of the flour that is emptied by Austin into the jar is given by
Therefore, the fraction of the jar that is filled will be
Thus, two-third of the jar is filled with flour.