Answer :
Try to find the lowest common denominator. In this case it's 28, which makes our numbers as follows:
1/4 = 7/28
1/7 = 4/28
7/28 + 4/28 = 11/28
We can't simplify it so that's the result.
1/4 = 7/28
1/7 = 4/28
7/28 + 4/28 = 11/28
We can't simplify it so that's the result.
