Lesson: Proportions Holt Mathematics • Course 2 • Holt Mathematics • Course 1 • Holt McDougal Larson Algebra 1 • 1st Edition • Glencoe • Algebra 1 • Math in Focus • Singapore Math • Course 2 • Volume A • Common Core • JUMPMath 6.2 • Part 2 of 2 • Assessment & Practice • US Edition • enVisionmath2.0 • Grade 6 • Volume 2 • Common Core • Prentice Hall • Mathematics • Course 2 • Common Core • 2013 • Prentice Hall • Algebra 1 • Common Core • Go Math! • Grade 6 • Common Core • Glencoe • Geometry • Common Core • Glencoe • Algebra 1 • Common Core • Math Connects • Concepts, Skills, and Problem Solving • Course 3 • Student Edition • Math Connects • Concepts, Skills, and Problem Solving • Course 2 • Student Edition • Math Connects • Concepts, Skills, and Problem Solving • Course 1 • Student Edition