This article provides a detailed overview of ratio principles and practice. We will cover topics such as:

• Equivalent ratios
• Dividing a given quantity based on a ratio, using both the unitary and ratio methods
• Scale drawings and the process of representing real length on paper in terms of diagram length
• The concept of rate, including the rate of change of one thing with respect to another
• Kinematic graphs and how the graphical representation of the rate of change between two variables works
• Analyzing graphs and interpreting distance-time graphs, as well as converting them into speed-time graphs
• Discussion of direct and inverse proportion, along with the associated graphical representations
• Direct and inverse proportion in algebraic terms and the formulation of equations based on proportions
• The concept of increasing or decreasing amounts based on a given ratio