HP 12c Platinum Error 0 in Percent Difference

[Gene]

Don't feel silly.

The 12cp key font used when we were editing that owners manual to add the algebraic functions was not the best. I wish the = and a few other symbols had been better designed.

That said, the first 12cp owners manual did not include **any** examples of how to use the algebraic mode at all. Now as an RPN enthusiast, that was not a big deal to me, but some HP customers may attempt to use it in algebraic mode :-) and we convinced HP it should be added for keystrokes, programs, etc.

The appendix is a particularly interesting read, especially the write-up on LstX and the history stack in algebraic mode. Thanks to Tony Hutchins for his efforts in those complicated areas.

Be sure to download the 12c platinum solutions book with algebraic program versions from the manual as well as for the original RPN programs that were included in the solutions book. Here's a good place to download it.

HP 12c solutions book PDF with algebraic and RPN

That PDF should be copied and made easily available to some other people...