If I am reading this correctly the stop price went from 28 and 1/8th up 1/4
28 1/8 + 1/4
find a common denominator in the fractions. In this case it would be 8
1/4=2/8
28 1/8 + 2/8 = 28 3/8
then the price dropped 5/8
28 3/8 - 5/8
you can take 1 away from the whole number 28 and make it 8/8
In other words 27 11/8 is the same as 28 3/8
Now you can subtract
27 11/8 - 5/8 = 27 6/8
That can be reduced to
27 3/4