The following is a description of the book's content. The present book consists of two parts: Part One and Part Two. Part One is fundamentally theoretical; Part Two, which is a problem solution manual, is practical in nature. Part One begins with Chapter 1, which presents a comprehensive coverage of the principles of elementary mathematics, focusing on the fundamental concepts about percentages, ratios and proportions, simple and compound interests, as well as the properties of direct and indirect proportionalities. Chapter 2 gives additional treatment on elementary geometry, integrated with...