Question: what is the mathematical definition for scaling?
Answer: The ratio of the length in a drawing (or model) to the length on the real thing. Example: in the drawing anything with the size of "1" would have a size of "10" in the real world, so a measurement of 150mm on the drawing would be 1500mm on the real horse. See: Ratio. Drag the butterfly to change its scale. Scale 1 : 1.