Answer:
The width of the frame must be 12 inches (15in by 12in)
Explanation:
Given
See attachment for painting and frame
Required
Determine the dimension of the frame
To do this, we make use of the following scale ratio.
For the painting,
For the frame,
Since she wants to maintain the same ratio; both scale must be the same.
i.e.
Express as fraction
Make w the subject
The width of the frame must be 12 inches i.e. 15in by 12in frame