Texas Instruments BA II PLUS - Manual (Page 74)

70 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