In this lesson on proportions, Professor Perez explains what a proportion is and teaches two methods for solving them: cross multiplication and clearing fractions. Through examples, the methods are shown to be interchangeable, and students are shown how to apply these concepts to complex fractions with decimals. Students are also reminded to reduce their answers where possible, and to check their work through multiplication.
Learn what a proportion is, how to set one up, and a couple of methods of solving proportions.
Created by and copyright of Larry Perez. Funded by the state of California through Saddleback College. More information on videos, resources, and lessons at Algebra2Go.