Triangle PQR is transformed to the similar figure P'Q'R'. What is the scale factor of dilation? 1/2,1/3,1/4,1/5

The answer is 1/2 and that is because if you calculate how long a segment is, lets say PQ then thats 8-4 and you get 4. and then P'Q' thats 4-2 which equals 2 and that is 1/2 of 4
The answer is 1/2 and that is because if you calculate how long a segment is, lets say PQ then thats 8-4 and you get 4. and then P'Q' thats 4-2 which equals 2 and that is 1/2 of 4