The number of miles he can run in an hour is 9 1/2 miles
Here, we want to get the number of miles Andrew can jog in an hour
Let the number of miles in 1 hour be x miles
From the question;
[tex]\begin{gathered} 14\frac{1}{4}\text{ miles = 1}\frac{1}{2}\text{ hours} \\ \\ x\text{ miles = 1hour} \\ \\ 14\frac{1}{4}\times1\text{ = x}\times1\frac{1}{2} \\ \\ \frac{57}{4}\text{ = x}\times\frac{3}{2} \\ \\ 57\times2\text{ = 3x}\times4 \\ \\ x\text{ = }\frac{57\times2}{3\times4}\text{ = }\frac{19}{2}\text{ = 9}\frac{1}{2}\text{ miles} \end{gathered}[/tex]
