5/8 of a gallon
cover 4/5 of a wall
rate = 4/5 / 5/8 or
[tex]\frac{\frac{4}{5}}{\frac{5}{8}}\text{ = }\frac{(4\text{ x 8)}}{(5\text{ x 5)}}\text{ = }\frac{32}{25}\text{ or 1 }\frac{7}{25}[/tex]Done
There are two possible answers B and C, but if you need to choose only one, it will be C.