One and one fourth plus one and one third equals?

Answer 1

In order to add fractions you must have them over a common denominator.

The lowest common denominator in that case is twelfths.

Ok, now to convert...

1 1/4 = 1 3/12

1 1/3 = 1 4/12

now the addition is easy

1 3/12 + 1 4/12 = 2 7/12