A36 inch by 48 inch poster is reduced to an image that is 3 in by 4 inch in size. what is the scale factor?

a: 1/3
b: 1/6
c: 1/9
d: 1/12

The correct answer for the question that is being presented above is this one: "D: 1/12."
The original dimension is 36 x 48.
The scaled dimension is 3 x 4.

The ration between 3 and 36 ;  4 and 48 is reduced to 1/12.
So the scale factor is 1/12.

The answer is 76° i believe