Texas Instruments TI-80 Manual Book page 67

The TI.80 uses the lowest common factor for simplification. If you want to
choose the simplification factor yourself, you can enter it as part of the
expression.
6. Press M to clear the screen. Reenter the
expression, or press 2 ² until you see the
expression 1À
6º27
7. Press 2 6 2 / c 2 9 b
simplification factor 9 and places the expression in
parentheses.
8. Press J
1 to copy
9. Press ¸ to simplify the fraction result. The
simplification factor is displayed.
10. Press 2 ± J
fraction result to a simple fraction.
11. Press 2 ± J
result to its decimal equivalent.
+ 1À .
1º9
d. This adds the
9
úSIMP
to the cursor location.
¸ to convert the mixed
2
¸ to convert the fraction
5
Fractions 3-3