This is likely a subtraction of two mixed numbers.
31/4 - 23/4 = 1/2
The solution is obtained by converting the mixed numbers to improper fractions:
3 1/4 = 13/4
2 3/4 = 11/4
Subtracting, you get 2/4, which in reduced form is 1/2.
negative 1 over 3
1 over 2
2/5 minus 1/15 is 1/3
3/6 minus 2/8 is 1/4
It is: 1 -2/3 = 1/3
3/2 minus 1/5 = 1 3/10
3 and 2/5 minus 1 and 1/3 = 2 and 1/15
1/2 minus 3/7 is 1/14
negative 1 over 3
1 and 1 over 3
1 and 2/3
1 over 2
3/2 minus 2 equals -1/2
1 1/2
2 and 1/12 minus 1 and 1/3 = 3/4 or 0.75
2/5 minus 1/15 is 1/3
1 over 2