I can split 2 into fourths as indicated in the denominator, 4. So each of the 2 wholes is split into 4. I have 8 fourths, plus the 3 fourths from [ggfrac]3/4[/ggfrac]. In total, there are 11 fourths, so 2[ggfrac]3/4[/ggfrac] = [ggfrac]11/4[/ggfrac].