a fraction whose numerator or denominator is also a fraction

a fraction within a fraction

a rational expression that has a fraction in its numerator, denominator or both

This is any fraction with either the numerator, the denominator, or both containing a fraction.

A fraction in which the numerator or the denominator, or both, are contain fractions.

A fraction where the numerator, the denominator, or both are fractions themselves.

A fraction having a fraction or fractions in the numerator and/or denominator.

A fraction that has frac- tions in either the numerator or the denominator or both.

A complex fraction is a fraction that has a fraction in the numerator, denominator, or both.