well first you need to get what one fourth of a mile is which is 1 over 24 or one twenty fourth then you multiply that by the five from the 4 over 5 or four fifths and that gets you to 5 over five and one four point eigth of a hour (this may not be true im not entirely sure) for the second part 4 over 5 times 6 which is really just 4 times 6 under five which is 4 miles and five over four of a mile