Help with Fraction Story Problems for Kids - Math and Reading Help To do this, multiply the numerator and denominator of each fraction by the denominator of the other fraction, and then add the two results together, like this: 6/8 + 2/3 = (3/3) (6/8) + (8/8) (2/3) = 18/24 + 16/24 = 34/24 =17/12 or 1 5/12 Fraction Problems with Division