I'm not sure which solution you read, but if you only wish to change certain dimensions:
If your property manager is not visible, go to tools on the menu, and click on properties.
Click on your dimension.
In Property Manager, scroll down to Primary Unit System, change the 2nd box to Fractional.
Scroll up to Text, change 2nd box to Horizontal.
If you want all of your dimensions to be fractional, go to Format on the menu and click
Dimension Styles, Drafting Styles.
Click on New, type in a new name and change the other boxes to suit.
Under Linear Dimension, change Format to Fractional and Fractional Display to Horizontal, others to suit.
Sylvia