mixed fraction program for hp 28s

[Thomas Klemm]

(10-11-2024 02:51 PM)Rafa Wrote:  I was getting syntax error and the cursor is placed at the parenthesis (1,1)

You probably use a comma , instead of a period . as decimal point character.
Either use a semicolon ; or just a space between the numbers: (0 1) (1 1)

(10-11-2024 02:51 PM)Rafa Wrote:  is it working on your calculator?

It runs on an HP-48. I assumed it would run on an HP-28 too.
If complex numbers don't work, you could try using vectors instead: [0 1] [1 1]
And then use V→ instead of C→R to decompose them.