first you want them both to have a common denominator. So you find the least common factor of 6 and 8 which is 24. So you multiply 6x4 to get 24 then multiply the numerator by 4 (5x4=20) and you would get 20/24. Next multiply 8x3 which is 24, then do the same to the numerator 5x3=15 and you would get 15/24.
next you want to compare the two fractions. Which is greater, 20/24 or 15/24? Well, 20 is greater than 15, so the answer to your question is 20/24 which is 5/6 in the simplest form!!!
final answer: 5/6
5/6 is greater than 5/8
5/6 > 5/8