What is fraction 2 out of 3 plus 3 out of 4?

2 out of 3' is '1'

'3' out of '4' is 1'

So their fraction is 1/1 = 1

However, I think you mean

2/3 + 3/4 , which is the addition of fractions.

{2(4) + 3(3)} / (3 x 4) =>

{ 8 + 9} / 12

=>

11/12 The answer!!!!!