### Home > MC2 > Chapter 7 > Lesson 7.1.2 > Problem 7-21

7-21.

Simplify each expression.

Multiply the numerators together and the denominators together.

Find a common denominator.

Multiply, see (a) for help.

Multiply the terms, then find the common denominator.

Make improper fractions, then find the least common denominator.

Convert the mixed numbers into improper fractions before multiplying.