The first step is to recognize the relationship between distance x, time t and speed v. Speed is distance divided by time.

miles per hour = mi/hr
v  =  x / t
65 mi/hr  =  (25 mi) / t

Then we solve for t

t  =  (25 mi) / (65 mi/hr)  =  (25/65) hr  =  (5/13) hr

Since we have the time expressed in hours, but we want time in minutes, we have to convert using the identity

60 min  =  1 hr
t  =  [(5/13) hr] (60 min)/(1 hr)  =  (60 · 5/13) min  =  (300/13) min  ≈  23.1 min

In the final step, 300/13 is approximately 23.0769 minutes, but we have rounded to a precision of one tenth minute.