HP 33s - Manual (Page 90)

5–8 Fractions
In an equation or program, the RND function does fractional rounding if
Fraction–display mode is active.
Example:
Suppose you have a 56
3
/
4
–inch space that you want to divide into six equal
sections. How wide is each section, assuming you can conveniently measure
1
/
16
–inch increments? What's the cumulative roundoff error?
Keys: Display: Description:
16 | Œ
 Sets up fraction format for
1
/
16
–inch increments. (Flags 8
and 9 should be the same as for
the previous example.)
56  3  4 I D  + Stores the distance in D.
6 q
+ S The sections are a bit wider than
9
7 /
16
inches.
{ J
+  Rounds the width to this value.
6 z
 +  Width of six sections.
L D .
+  The cumulative round off error.
| y {} 8 .
+  Clears flag 8.
{ ‹
.
)
 Turns off Fraction–display mode.
Fractions in Equations
When you're typing an equation, you can't type a number as a fraction. When an
equation is displayed, all numeric values are shown as decimal values —
Fraction–display mode is ignored.
When you're evaluating an equation and you're prompted for variable values,
you may enter fractions — values are displayed using the current display format.
See chapter 6 for information about working with equations.