What is a complex fraction give an example?

A complex fraction is a fraction where either the numerator, the denominator, or both contain fractions themselves. For example, the expression (\frac{\frac{1}{2}}{\frac{3}{4}}) is a complex fraction, where both the numerator and the denominator are simple fractions. Complex fractions can be simplified by multiplying the numerator and denominator by the least common denominator of the fractions involved.