trouble using fPart on TI-82

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trouble using fPart on TI-82

Hello,  Can anyone help me with this problem?  Grab your TI-82 and
confirm the following:


19/17  ENTER
1.117647059


fPart Ans  ENTER
.117647059


Ans ^-1  ENTER
8.5


fPart Ans  ENTER
.5


Ans ^-1  ENTER
2


fPart Ans  ENTER
1


!?!?  Any ideas how to get around this problem?  I assume some internal
flag is getting in the way of the fPart routine.  Technically I guess it's
correct since 19/17 = 1.11764705882352941176... and not 1.117647059 but
then it's inconsistent in displaying 8.5 as the reciprocal of .117647059.
Please either tell me this is a bug on old 82's or help me find a way
around this problem--meaning a way to get consistent results between
what the calculator is keeping track of internally and what it displays.


Thank you in advance,
Paul