HP 35s Extract Denominator from Fraction

[bcode]

(08-11-2014 04:14 PM)Joe Horn Wrote:  

(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.

Ya well it'll be easy to spot since the numerator of the reciprocal should match the denominator of the original.