This math topic focuses on understanding and finding equivalent fractions, specifically by determining the missing numerator. It involves a series of problems where the fraction on one side of the equation is given, and students are required to find the numerator that makes the two fractions equivalent, given a fixed denominator on the other side. The fractions used for these problems involve only single-digit numerators and denominators, making it suitable for learners who are being introduced to the concept of comparing and creating equivalent fractions.