Formula and Givens
Givens
d = 2/3 mile
t = 1/6 hour
r = ????
Formula
d = r*t is the way it is normally written.
r = d/t is what you want.
Substitution and Solve
r = d/t
r = [tex] \frac{2/3}{1/6} [/tex]
Now you turn the denominator upside down and multiply.
r = [tex] \frac{2}{3} * \frac{6}{1} [/tex]
The 3 and the six partially cancel.
You get 2 * 2 = 4 miles / hour.
Answer
4 miles / hour <<<< answer