HP 35s Extract Denominator from Fraction

[Joe Horn]

(08-11-2014 07:37 AM)bcode Wrote:  And yeah, your example fails because the maximum denominator is 4095, which is understandable.

Exactly. However, sometimes the 1/x trick fails even when the denominator would be 4095 or less, due to roundoff errors, since pressing 1/x doesn't really reciprocate the fraction that's displayed, but instead performs a rounded-off approximation of the reciprocal of a number which itself is already a rounded-off approximation. I just now tried to whip up an example of that, and couldn't find one, but I know I've often seen it in the past, so don't be surprised when it happens.