TI-73 (Explorer): Percents and Random Fractions
TI-73 Program: PERCENT
TAX+: Appropriately add a percent to a number. Application: Sales Tax
TAX-: Appropriately subtract a percent from a number. Application: Discount
% CHANGE: Percent change from the old number to new number. Additional application: Percent Markup (OLD = cost, NEW = selling price)
%TOT: Finds the percentage portion of a total number
% MARGIN: Given an item's cost and selling price, calculate the item's percent margin.
Code:
(spaces added for clarity)
"EWS 2023-12-02" // (comment)
Lbl 0
Menu("PERCENT","TAX+",1,"TAX-",2,
"% CHANGE",3,"%TOT",4,"% MARGIN",5,
"EXIT",E)
Lbl 1
Prompt N
Input "X% ",X
N*(1+X%)→Y
Disp "ANSWER="
Pause Y
Goto 0
Lbl 2
Prompt N
Input "X% ",X
N*(1-X%)→Y
Disp "ANSWER="
Pause Y
Goto 0
Lbl 3
Input "OLD=",O
Input "NEW=",N
(N-O)*100/O→Y
Disp "% CHANGE="
Pause Y
Goto 0
Lbl 4
Input "PART=",P
Input "WHOLE=",W
100*P/W→Y
Disp "%"
Pause Y
Goto 0
Lbl 5
Input "COST=",C
Input "SELL PRICE=",S
(S-C)/S*100→Y
Disp "% MARGIN="
Pause Y
Goto 0
Lbl E
Disp "BYE"
Pause
Note: Results that are to be displayed need to be followed or accompanied by a Pause command, unless the results will not show. This wrinkle is unique to the TI-73.
TI-73 Program: RANDFRAC
Generate a number of fractions with randomized numerators and denominators.
T = number of fractions to be generator
L = upper limit that the numerator and denominator can take. The numbers range from 1 to L
The result is returned in three parts:
numerator
denominator
fraction
For example:
5
7
5/7
Simplification rules are set through the MODE key.
Code:
(spaces added for clarity)
"EWS 2023-12-02" // (comment)
Disp "NO. FRACTIONS"
Prompt T
Disp "UPPER LIMIT"
Prompt L
For(I,1,T)
randInt(1,L)→N
randInt(1,L)→D
N ⁄ D→F // N [ b/c ] D [ STO> ] F
Disp N,D,F
Pause
End
Note: The fraction symbol pressed by [ b/c ], symbolized by ⁄, shows on the screen as a thick division slash.
For those of you who are celebrating, Merry Christmas!
Eddie
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