## Key Concepts

• Multiply or divide mixed numbers.
1. Convert the mixed numbers to improper fractions.
2. Follow the rules for fraction multiplication or division.
3. Simplify if possible.
• Simplify a complex fraction.
1. Rewrite the complex fraction as a division problem.
2. Follow the rules for dividing fractions.
3. Simplify if possible.
• For any positive numbers $a$ and $b$ , ${\Large\frac{-a}{b}}={\Large\frac{a}{-b}}={\Large-\frac{a}{b}}$