Changing the scale of drawing can often be problematic, but using a simple chart like the one above, it is quite simple. If you are using software that scales using a factor of 1.0 as 100%, then simply adjust the figures above accordingly so for example, 10% is 0.1 and 200% is 2.0. Getting to grips with scales and moving between them takes a bit of practice, and I’ve found that when getting confused about the adjustment needed, writing down some basic calculations and figures often helps a great deal.
Jamie Strong 