Question

1/2 plus what equals 7/8

Answer 1

11/8 or 1 3/8

You must have the same denominator. Therefore, multiply 1/2 by 4 to get a denominator of 8. Be sure to do this for the numerator as well. You end up with 4/8 plus 7/8. You result with 11/8 or simplified 1 3/8.