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%T function question
03-13-2023, 04:24 AM (This post was last modified: 03-13-2023 04:24 AM by nickapos.)
Post: #1
%T function question
Hey everyone does anyone know if %T function exists in Plus42 or 50g?

Copying from one of the financial calculator books:

Quote:And with the key, you can find what percent one number is of another number or of the sum of several numbers. You are finding proportions when you use [%T].


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03-13-2023, 05:02 AM
Post: #2
RE: %T function question
There is no built in %T function in Plus42 but it’s easy to program :

Code:
01 LBL "%T"
02 1/X
03 %
04 1/X
05 END

(From HP KEY NOTES V5N3 Dec 81 p13)
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03-13-2023, 05:05 AM
Post: #3
RE: %T function question
(03-13-2023 05:02 AM)Didier Lachieze Wrote:  There is no built in %T function in Plus42 but it’s easy to program :

Code:
01 LBL "%T"
02 1/X
03 %
04 1/X
05 END

(From HP KEY NOTES V5N3 Dec 81 p13)

Cheers for that, that was the next step for me. I just wondered if it existed under another name.
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03-13-2023, 07:48 AM
Post: #4
RE: %T function question
(03-13-2023 04:24 AM)nickapos Wrote:  Hey everyone does anyone know if %T function exists in Plus42 or 50g?

In the 50g, it's in the MTH REAL menu.

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03-13-2023, 08:58 AM
Post: #5
RE: %T function question
(03-13-2023 07:48 AM)Joe Horn Wrote:  
(03-13-2023 04:24 AM)nickapos Wrote:  Hey everyone does anyone know if %T function exists in Plus42 or 50g?

In the 50g, it's in the MTH REAL menu.

Awesome cheers.
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03-13-2023, 09:13 AM
Post: #6
RE: %T function question
I see newrpl has it as %T as well.
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03-13-2023, 10:10 PM (This post was last modified: 03-13-2023 11:29 PM by PedroLeiva.)
Post: #7
RE: %T function question
To complete what nickapos contributed, I have attached a PDF with three usage options for percentages. I had not sufficiently taken into account the great advantage of the %, %CH and %T functions in relation to the fact that once the function is executed it preserves the original value of the Y register. This provides great agility in repetitive calculations.

This text was intended primarily for the HP-67 and HP 35s calculators
Pedro

PS: Sorry I have attached the wrong file, now correct


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.pdf  HP 67 - Percentages.pdf (Size: 136 KB / Downloads: 63)
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03-14-2023, 12:01 AM
Post: #8
RE: %T function question
(03-13-2023 10:10 PM)PedroLeiva Wrote:  To complete what nickapos contributed, I have attached a PDF with three usage options for percentages. I had not sufficiently taken into account the great advantage of the %, %CH and %T functions in relation to the fact that once the function is executed it preserves the original value of the Y register. This provides great agility in repetitive calculations.

This text was intended primarily for the HP-67 and HP 35s calculators
Pedro

PS: Sorry I have attached the wrong file, now correct

FYI the HP-67 implementation and the snippet of code for HP-41/42 preserve the original number, but the implementation for HP-50g/newRPL does not.
Interesting implementation difference there.
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