Question

Three fourths of a mile in two thirds of an hour what is his hiking speed per hour

Answer 1

So,

The rate is 3/4 miles per 2/3 hour.

To find the rate per hour, we need to multiply 3/4 by the reciprocal of 2/3, which is 3/2.
$\frac{3}{4} * \frac{3}{2} = \frac{9}{8}$

That can also be written as 1.125 mph.