Worksheet Variables
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• To reset the Percent Change/Compound Interest variables to default
values, press & z while in the Percent Change/Compound
Interest worksheet.
• To reset default values for all calculator variables and formats, press
& } !.
Entering Values
• For percent-change calculations, enter values for any two of the
three variables (OLD, NEW, and %CH) and compute a value for the
unknown variable (leave #PD=1). A positive percent change
represents a percentage increase; a negative percent change
represents a percentage decrease.
• For compound-interest calculations, enter values for the three
known variables and compute a value for the unknown fourth
variable.
– OLD= present value
– NEW= future value
– %CH= interest rate per period
– #PD= number of periods
• For cost-sell-markup calculations, enter values for two of the three
variables (OLD, NEW, and %CH) and compute a value for the
unknown.
– OLD = cost
– NEW= selling price
– %CH= percent markup
– #PD= 1
Computing Values
1. To select the Percent Change/Compound Interest worksheet, press
& q. The current value for OLD is displayed.
2. To clear the worksheet, press & z.
Variable Default Variable Default
OLD 0 %CH 0
NEW 0 #PD 1
3. To enter values for the known variables, press # or " until the
variable you want is displayed, then key in a value, and press !.
(Do not enter a value for the variable you wish to solve.)
• Percent Change — Enter values for two of these three
variables: OLD, NEW, and %CH. Leave #PD set to 1.
• Compound Interest — Enter values for three of these four
variables: OLD, NEW, %CH, and #PD.
• Cost-Sell-Markup — Enter values for two of these three
variables: OLD, NEW, and %CH. Leave #PD set to 1.
4. To compute a value for the unknown variable, press # or " until the
variable you want is displayed and press %. The calculator displays
the value.
Example: Computing Percent Change
First, determine the percentage change from a forecast amount of $658
to an actual amount of $700. Second, determine what the new amount
would be if it were 7% below the original forecast.
Answer: $700 represents a 6.38% increase over the original forecast of
$658. A decrease of 7% would result in a new actual amount of $611.94.
Example: Computing Compound Interest
You purchased stock in 1995 for $500. Five years later, you sell the stock
for $750. What was the annual growth rate?
To Press Display
Select Percent Change/Compound
Interest worksheet.
& q OLD= 0
Enter original forecast amount. 658 ! OLD= 658.00
Enter actual amount. # 700 ! NEW= 700.00
Compute percent change. # % %CH= 6.38
Enter -7 as percent change. 7 S ! %CH= -7.00
Compute new actual amount. " % NEW= 611.94
To Press Display
Select Percent Change/Compound
Interest worksheet.
& q OLD= 0
Enter stock purchase price. 500 ! OLD= 500.00
Enter stock selling price. # 750 ! NEW= 750.00
Answer: The annual growth rate is 8.45%.
Example: Computing Cost-Sell-Markup
The original cost of an item is $100; the selling price is $125. Find the
markup.
Answer: The markup is 25%.
Interest Conversion Worksheet
Note: The calculator categorizes variables by their method of entry.
Enter number of years. # # 5 ! #PD= 5.00
Compute annual growth rate. " % %CH= 8.45
To Press Display
Select Percent Change/Compound
Interest worksheet.
& q OLD= 0
Clear worksheet variables. & z OLD= 0.00
Enter original cost. 100 ! OLD= 100.00
Enter selling price. # 125 ! NEW= 125.00
Compute percent markup. # % %CH= 25.00
The Interest Conversion worksheet converts interest rates
between nominal rate (or annual percentage rate) and
annual effective rate.
• To access the Interest Conversion worksheet, press &
v.
• To select interest conversion variables, press # or ".
Variable Key Display Variable Type
Nominal rate & v NOM Enter/compute
Annual effective rate # EFF Enter/compute
Compounding periods per year # C/Y Enter-only
• To reset the Percent Change/Compound Interest variables to default
values, press & z while in the Percent Change/Compound
Interest worksheet.
• To reset default values for all calculator variables and formats, press
& } !.
Entering Values
• For percent-change calculations, enter values for any two of the
three variables (OLD, NEW, and %CH) and compute a value for the
unknown variable (leave #PD=1). A positive percent change
represents a percentage increase; a negative percent change
represents a percentage decrease.
• For compound-interest calculations, enter values for the three
known variables and compute a value for the unknown fourth
variable.
– OLD= present value
– NEW= future value
– %CH= interest rate per period
– #PD= number of periods
• For cost-sell-markup calculations, enter values for two of the three
variables (OLD, NEW, and %CH) and compute a value for the
unknown.
– OLD = cost
– NEW= selling price
– %CH= percent markup
– #PD= 1
Computing Values
1. To select the Percent Change/Compound Interest worksheet, press
& q. The current value for OLD is displayed.
2. To clear the worksheet, press & z.
Variable Default Variable Default
OLD 0 %CH 0
NEW 0 #PD 1
3. To enter values for the known variables, press # or " until the
variable you want is displayed, then key in a value, and press !.
(Do not enter a value for the variable you wish to solve.)
• Percent Change — Enter values for two of these three
variables: OLD, NEW, and %CH. Leave #PD set to 1.
• Compound Interest — Enter values for three of these four
variables: OLD, NEW, %CH, and #PD.
• Cost-Sell-Markup — Enter values for two of these three
variables: OLD, NEW, and %CH. Leave #PD set to 1.
4. To compute a value for the unknown variable, press # or " until the
variable you want is displayed and press %. The calculator displays
the value.
Example: Computing Percent Change
First, determine the percentage change from a forecast amount of $658
to an actual amount of $700. Second, determine what the new amount
would be if it were 7% below the original forecast.
Answer: $700 represents a 6.38% increase over the original forecast of
$658. A decrease of 7% would result in a new actual amount of $611.94.
Example: Computing Compound Interest
You purchased stock in 1995 for $500. Five years later, you sell the stock
for $750. What was the annual growth rate?
To Press Display
Select Percent Change/Compound
Interest worksheet.
& q OLD= 0
Enter original forecast amount. 658 ! OLD= 658.00
Enter actual amount. # 700 ! NEW= 700.00
Compute percent change. # % %CH= 6.38
Enter -7 as percent change. 7 S ! %CH= -7.00
Compute new actual amount. " % NEW= 611.94
To Press Display
Select Percent Change/Compound
Interest worksheet.
& q OLD= 0
Enter stock purchase price. 500 ! OLD= 500.00
Enter stock selling price. # 750 ! NEW= 750.00
Answer: The annual growth rate is 8.45%.
Example: Computing Cost-Sell-Markup
The original cost of an item is $100; the selling price is $125. Find the
markup.
Answer: The markup is 25%.
Interest Conversion Worksheet
Note: The calculator categorizes variables by their method of entry.
Enter number of years. # # 5 ! #PD= 5.00
Compute annual growth rate. " % %CH= 8.45
To Press Display
Select Percent Change/Compound
Interest worksheet.
& q OLD= 0
Clear worksheet variables. & z OLD= 0.00
Enter original cost. 100 ! OLD= 100.00
Enter selling price. # 125 ! NEW= 125.00
Compute percent markup. # % %CH= 25.00
The Interest Conversion worksheet converts interest rates
between nominal rate (or annual percentage rate) and
annual effective rate.
• To access the Interest Conversion worksheet, press &
v.
• To select interest conversion variables, press # or ".
Variable Key Display Variable Type
Nominal rate & v NOM Enter/compute
Annual effective rate # EFF Enter/compute
Compounding periods per year # C/Y Enter-only