Hey there!
I'm going to set up the equation slightly different.

Answer:
0
Step-by-step explanation:
The points on a number line are called coordinates. The zero point is called the origin. The numbers to the right of the origin are positive numbers; the numbers to the left of the origin are negative numbers.
you turn 1 and 1 over 5 into 6 over 5. then divide.
12 divided by 6 over 5 equals 10
Scale factor:
10/4= 2.5
X = 5 x 2.5 = 12.5
Y= 8/ 2.5 = 3.2
Z= 15/2.5 = 5