The answer depends on what aspect of the scale drawing you wish to calculate.
It shows the constant of proportionality between the scale drawing and the real-life object.
it depends of the scale of the drawing
# is the ratio of the demensions in the drawing to the corresponding actual dimensions. The scale factor for a scale drawing is the ratio of the dimensions in the drawing to the corresponding acual bimensions.
scale questions
1cm = 78.6
Not all drawings are done to scale, sketches of buildings and people for instance. However if it is a technical drawing the draughtsman/woman will state on the drawing the scale used.
A drawing of the object in scale.
a scale drawing.
The scale factor of a scale drawing is the ratio of any length in the drawing to the true corresponding length in the "real" object.
scale drawing
The scale drawing in math is fun. You have to know the challenge level of the basic Mathematics.