How to add a positive and negative fraction

The video tutorial covers the process of combining fractions, emphasizing the need for common denominators. It explains how to find a common denominator by multiplying denominators and checking for the least common denominator. The tutorial also discusses the importance of maintaining equivalent fractions when multiplying and provides a step-by-step guide to combining fractions with common denominators.

Why is it important to multiply both the numerator and denominator when adjusting fractions?

Explain how to combine fractions with a common denominator.