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