Solution: Convert $2 \frac12$ to an improper fraction: $\frac52$. Subtract $\frac34$: $\frac52 - \frac34 = \frac104 - \frac34 = \frac74$. The remaining storage is $\frac74$ terabytes, which is $\boxed\dfrac74$ of the total. - Veritas Home Health