Answer:
The answer is 4/12
Step-by-step explanation:
Since you can't simplify 7/12 you would multiply the denominator of 4 by 3 and the numerator of 1 by 3 getting the fraction of 3/12.
After that you'd subtract 7/12 by 3/12 to get an answer of 4/12 or 1/3.
Hope this helps! :>