Answer
1$\frac{1}{2}$ gal
Work Step by Step
Let pilot flies to an island off the coast of North Carolina uses 25$\frac{1}{4}$ gal of fuel, it use 23$\frac{3}{4}$ gal of fuel in return trip.
Therefore difference in the fuel used= 25$\frac{1}{4}$ gal - 23$\frac{3}{4}$ gal
= $\frac{101}{4}$ - $\frac{95}{4}$
=$\frac{6}{4}$
=$\frac{3}{2}$
=1$\frac{1}{2}$ gal
