HP 35s User Manual page 220

Flag
Status
Clear
Fraction display
off; display real
(Default)
numbers in the
current display
format.
Set
Fraction display
on; display real
numbers as
fractions.
14-10
Programming Techniques
Fraction–Control Flags
7
Fraction
denominators not
greater than the /c
value.
Fraction
denominators are
factors of the /c
Value.
8
Reduce fractions to
smallest form.
No reduction of
fractions. (Used
only if flag 8 is
set.)
9