Usually we find the order of the fractions by getting the percentage or from using LCM, but in this case, since the denominators are equal, you just have to look at the nominators and you can see that 1 is smaller than 3 and 3 is smaller than 5.
Ascending order is arranging the values from the smallest to the largest.
While descending order is arranging the values from the largest to the smallest.
Therefore, the answer is:
Ascending order ; 1/8, 3/8, 5/8
Descending order ; 5/8, 3/8, 1/8