Somewhere between Mathcad 2001i and Mathcad 15 the symbolic keyword "factor" will no longer give the ratio of integers for a rational fraction. Does anyone know which version this happened at? Does anyone know how to accomplish this in Mathcad 15? Thanks!

The symbolic processsor was changed from Maple to MuPad in version 14. That answers your first queston, but unfortunately I don't have an answer for the (more important) second question.

If you only need the fraction for one rational number, post the rational number here and I'll give you the fraction (I have multiple versions of Mathcad already installed).