Recalling A Menu Item Value In A Menu; Recalling And Storing Values In The Data And Cash Flow Menus; Rounding Numbers; Percentages - HP 30b - Business Professional Calculator User Manual

Recalling a Menu Item Value in a Menu

In a menu, you can recall the current value of a menu item. For example, open the Interest
Conversion menu (IConv) by pressing
2*L==
you need to insert the contents of a menu item into an algebraic operation.

Recalling and Storing Values in the Data and Cash Flow Menus

If you store an index (i) from 0 to 99 in the variable 0, you can then use the store/recall
features to store a number in the Data and Cash Flow menus. Press either
followed by the CashFlow key
CF(i/2) (if i is even) or #CF((i-1)/2) if i is odd.
In addition, you can store or recall x(i/2+1) if i is even, or y((i+1)/2) if i is odd, as desired,
by pressing the Data key

Rounding Numbers

All calculations are performed internally with 15-digit precision and are rounded to 12 digits
when returning the results. In certain instances, calculations are performed internally with
greater than 15-digit precision.
When displayed, a number is further rounded to the number of digits after the decimal point
set by the FIX item in the Mode menu. The default setting is two digits to the right of the
decimal point. For more information, refer to the section titled, The Mode Menu: Setting
Preferences in Chapter 1.
NOTE: the FIX setting only affects the display; it does not affect the actual numbers.

Percentages

In Algebraic or Chain modes, pressing
25%
To find a percentage of a given number, key in the number and multiply it by the desired
percentage, followed by
200*25%=
To add or subtract a percentage of a number, key in the first number, followed by
-
and the percentage followed by
to add 10% to 50, press
:&
calculates 2 times the nominal rate. This feature is useful when
C
, to either store or recall a number, as desired, in the
:y
instead of the CashFlow key,
returns 0.25.
=
. For example, to find 25% of 200, press
%
50+10%=
. With Nom.% displayed, pressing
%
divides a number by 100. For example, pressing
to return a result of 50.
. Finish your calculation with
:$ L
or
C
, as shown above.
+
=
. For example,
to return a result of 55.
Mathematical Calculations
,
or
25