Put the value of the letters with " over the original So for A we have 3 in the front and 4.5 for A" 4.5/3 = 1.5 We can check if this is actually the scale factor but using the other numbers The second numbers for A and A" are 6 and 9 6 * 1.5 = 9 So for point A it is 1.5 Use the same thing for G. That gives you 2 For B, you get 0.5 So the scale factors are 1.5, 2, and 0.5
