HP 20B - Manual (Page 54)

Business Problems
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Note: for business problems, margin is based on price; markup is based on cost. The examples below are shown with RPN as
the active operating mode.
Percent Calculation Examples
See Tables 8-1 through 8-4 for examples of calculations in the %calc menu.
1. Find the markup on an item if the cost price is $15.00 and the selling price is $22.00. See Table 8-1.
Table 8-1 Markup Example
Keys Display Description
:# Opens the %calc menu .
I Opens the Mkup.%C sub-menu.
15I Inputs 15 for Cost.
<22I Inputs 22 for Price.
<= Calculates the value of Mkup.%C for the given data.
2. Find the percent change between 20 and 35 with no compounding.
Table 8-2 Percent Change Example
Keys Display Description
:# Opens the %calc menu .
<<< Scrolls to %Change.
I Opens the %Change sub-menu.
20I Inputs 20 for Old.
<35I Inputs 35 for New.
<= Calculates the current value of %Change for the given
data.