Texas Instruments TI-73 Manual Book page 26

Display Format Mode
A§b/c
b/c
Simplification Mode
Autosimp
Mansimp
Number Line/Fraction Line for the TI-73
Displays result as a mixed number, if applicable.
Displays result as a simple fraction.
The calculator automatically simplifies fractional
entries.
The user simplifies a selected fraction entry
manually to its lowest form with the B key. $
next to a fraction signifies that it can be simplified.
Note: Mansimp does not work for labels.
Page 26