Format a LibreOffice Calc cell to display an improper (“top-heavy”) fraction

Normally, when entering =7/4 into a cell, it displays as “1 3/4”. I would like it to display as “7/4”, while still maintaining the ability to be used in calculations – I don’t want to convert it to a non-numeric format, just change how the numeric format is displayed.

Is there a way to format the cell such that it always displays as an improper (“top-heavy”) fraction?