Answer:
3/2 and 2/3
Explanation:
Scale Factor = Image / object
You can take either of the three sides so as far as it corresponds with the side of the other triangle
Let's take longest sides
= 15/10 = 3/2 That's scale Factor from Triangle PQR to STU
The second question is the reverse of the first one
= 10/15 = 2/3
The same applies to when you use the other sides of the triangles.