Entering values, Computing values – Texas Instruments Calculator User Manual
Page 76
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