Texas Instruments TI-15 Explorer Owner's Manual page 10

g. Stacked fractions, Entering mixed numbers, numerators, and denominators
.
Key in
3 5
 
8
4 8
You can enter either the numerator or denominator first. Fractions are stacked. You
can see the whole problem and the answer at the same time.
h. Converting mixed numbers to improper fractions
Press  to convert the mixed number to an improper fraction.
75
is displayed. Press  again to convert back to the mixed number.
8
displayed.
i. Converting fractions to decimals and vice versa
Press  to convert the fraction to a decimal.
9.375 is displayed. Press  again to convert back to the fraction.
375
This time 9
1000
The calculator uses the decimal value to create the fraction. The
the top of the screen lets you know that the fraction can be simplified further.
j. Simplify by a factor you choose.
Press    .
15
is displayed. Press  to see the factor used to simplify the fraction.
9
40
25 is displayed. The numerator and denominator were each divided by 25.
Press  again to return to the fraction.

The indicator lets you know the fraction can still be simplified further.
N/D n/d
k. Simplify by a factor the calculator chooses.
Press  .
Press  to see the factor used to simplify the fraction. 5 is displayed. Press
again to return to the fraction.

The indicator is no longer displayed. This means that the fraction cannot be
N/D n/d
simplified any further.
3
9 is displayed.
8
is displayed.
3
9 is displayed.
8
3
9 is displayed again.
8
15
9 is displayed again.
40
10
3
9 is
8

indicator at
N/D n/d