HP 20B - Manual (Page 55)

Business Problems
55
Note: although the example in Table 8-2 calls for no compounding, you may specify the number of compounding periods used
in calculations with the
Nb Period item in the %Change sub-menu. Nb Period is the number of compounding periods used in
calculations between the old value and new value. The default is 1 , but to change the setting, key in a number with Nb Period
displayed, followed by
I
.
After calculating the example above with no compounding, say, for example, you wish to calculate the percent change over
six compounding periods:
Table 8-3 Percent Change Example with Compounding
Keys Display Description
The current value of %Change for the given data.
<6I Inputs 6 for the number of compounding periods.
>= Calculates the percent change between the old value
and the new value over six compounding periods.
3. What is 30% of 80?
Table 8-4 Part % of Total Example
Keys Display Description
:# Opens the %calc menu .
<< Scrolls to the Part %Total menu item.
I Opens the Part as %Total sub-menu.
80I Inputs 80 for Total.
<30I Inputs 30 for Part.
<= Calculates the value of Part%Total for the given data.
To reset the menu items to their default values, with any item of the %calc menu displayed press
:x
. Press
>
or
<
to scroll until %Calc displays and press
I
to reset the menu, or
O
to cancel. Press
O
to exit the menu.