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Entering values, Computing values – Texas Instruments Calculator User Manual

Page 76

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72

Other Worksheets

Resetting the Percent Change/Compound Interest
Worksheet Variables

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