Rounding fractions – HP 33s User Manual
Page 89
Fractions
5–7
Number Entered and Fraction Displayed
Fraction
Format
¼
2 2.5 2
2
/
3
2.9999
2
16
/
25
Most precise
2
2 1/2
2 2/3S
3T 2
9/14T
Factors of
denominator
2
2 1/2
2 11/16T
3T 2
5/8S
Fixed
denominator
2 0/16 2 8/16 2 11/16T 3
0/16T
2 10/16S
¼ For a /c value of 16.
Example:
Suppose a stock has a current value of 48
1
/
4
. If it goes down 2
5
/
8
, what would
be its value? What would then be 85 percent of that value?
Keys:
Display:
Description:
| y
{ } 8
|
y
{} 9
Sets flag 8, clears flag 9 for
"factors of denominator"
format.
8
|
Sets up fraction format for
1
/
8
increments.
48
1
4
+
Enters the starting value.
2
5
8
+
Subtracts the change.
85
Q
+ S
Finds the 85–percent value to
the nearest
1
/
8
.
Rounding Fractions
If Fraction–display mode is active, the RND function converts the number in the
X–register to the closest decimal representation of the fraction. The rounding is
done according to the current /c value and the states of flags 8 and 9. The
accuracy indicator turns off if the fraction matches the decimal representation
exactly. Otherwise, the accuracy indicator stays on, (See "Accuracy Indicators"
earlier in this chapter.)