Answer:
1 : 4 = 1 / 4
Explanation:
this is actually a concept
if two triangles are scaled copy and their sides are in 1 : 2 ratio, then their area will be in 1 : 4 ratio.
here, in the figure that triangle's sides ratio is 6 : 12 = 1 : 2
therefore, the scale factor will be 1 /4 ( 1 : 4 )