5/4 - 2/3 in order to solve this you have to expand the fraction to get the least common denominator 5 x 3, 4 x 3 and 2 x 4, 3 x 4. So then you get 15/12 - 8/12.
Write all the numerators above the common denominator
15-8/12 subtract the numbers and get 7/12.
Your answer is Jim has run 7/12 miles so far.