a comlex fraciton is a fraction with another fraction in either the denomenator or the numerator (yo dawg, I heard you like fractions...) example [latex]frac{frac{2}{3}}{frac{6}{5}}[/latex] or [latex]frac{frac{2}{3}}{6}[/latex] or [latex]frac{2}{frac{6}{5}}[/latex]