Answer:
0.3
Step-by-step explanation:
To calculate the dilation factor of two similar figures, you simply need to establish the ratio of the dilated figure (in our case PQRS) to the original figure (ABCD) using the same relative side.
In our case, we'll take the longest of the sides provided in each figure.
So, we divide 12.6 by 42 to know the dilation factor of the longest side, it will be the same for all other sides:
d = 12.6 / 42 = 0.3
