Respuesta :

Answer:

 3 miles per hour

Step-by-step explanation:

he runs 1/3 mile in 1/9 of an hour

then

he runs (we multiply both sides by 9)

 9×(1/3) mile in 9×(1/9) of an hour

then

he runs

 (9/3) mile in (9/9) of an hour

then

he runs 

 3 mile in 1 hour