## Key Concepts

**Multiply or divide mixed numbers.**- Convert the mixed numbers to improper fractions.
- Follow the rules for fraction multiplication or division.
- Simplify if possible.

**Simplify a complex fraction.**- Rewrite the complex fraction as a division problem.
- Follow the rules for dividing fractions.
- Simplify if possible.

**Placement of negative sign in a fraction.**- For any positive numbers [latex]a[/latex] and [latex]b[/latex] , [latex]{\Large\frac{-a}{b}}={\Large\frac{a}{-b}}={\Large-\frac{a}{b}}[/latex]

**Simplify an expression with a fraction bar.**- Simplify the numerator.
- Simplify the denominator.
- Simplify the fraction.

## Glossary

- complex fraction
- A complex fraction is a fraction in which the numerator or the denominator contains a fraction.