You're just simply multiplying them by 2 because the scale factor being applied is 2. So..
P' Q' = 4 cm
A' B' = 3 cm
M' N' = 6 cm
36:1, 60:1, 10.53:1 hope this helps
10/1 * 1/3 = 30/3
1 1/3 = 4/3
4/3 can only go into 30/3, 7 times, with a remainder of 2/3.
7 2/3
