fx-82MS fx-82TL fx-9860GII
a b/c
On a Casio calculator you can enter a fraction
ab/c
Example 1
To calculate
3 ab/c 1 ab/c 4 + 1 ab/c 2 ab/c 3 = 3┘1┘4+1┘2┘3
4┘11┘12.
Example 2
To calculate
2 ab/c 4 = 2┘4
1┘2.ab/c 2┘4
0.5
Example 3
To calculate 
1 ab/c 2 + 1 · 6 = 1┘2+1.6
2.1
Results of calculations that mix fraction and decimal values are always decimal.
Example 4
To calculate
1 ab/c 2 + 1 ab/c 3 = 1┘2+1┘3
5┘6.
Example 5
To calculate
1 ab/c 9 = 1┘9
1┘9.× 9 = Ans×9
1.
Example 6
To calculate 1 / 2 = 0.5
1 ab/c 2 = 1┘2
1┘2.ab/c 1┘2
0.5
and convert it back again
ab/c 1┘2
1┘2.
Example 7
To convert the mixed fraction 1½ into the decimal fraction 1.5
1 ab/c 1 ab/c 2 = 1┘1┘2
1┘1┘2.ab/c 1┘1┘2
1.5
Example 8
To convert the decimal fraction 1.25 into the mixed fraction 1¼ and in the improper fraction 5/4
1 · 2 5 = ab/c 1.25
1┘1┘4.ab/c 1.25
5┘4.
.gif){kind=small}
Example 9
To calculate 2 1/2 = 5/2 = 2.5
2 ab/c 1 ab/c 2 = ab/c 2┘1┘2
5┘2.ab/c 2┘1┘2
2.5
Example 10
To calculate 5 8/3 = 7 2/3
5 ab/c 8 ab/c 3 = 5┘8┘3
7┘2┘3.
Math ERROR
You get an error message if you want to enter a mixed fraction while the d/c format is selected.