In this series, part of the Math Education Outreach Project, Associate Dean Susann Novalis of the San Francisco State University School of Science helps students prepare for the Entry Level Mathematics Examination and for further study of college-level m athematics. Novalis explains adding and subtracting algebraic fractions with unlike denominators in this video. The importance of finding the lowest common multiple ( LCM ) is noted. See also vhs, AT # 80435. Susann Novalis.