For addition of two unlike fractions, first change them to the like fractions. LCM of 5, 7 = 35 Now, let us change each of the given fraction into an equivalent fraction having 35 as the denominator. = [(3/5) × (7/7)] = (21/35) = [(2/7) × (5/5)] = (10/35) Now, = (21/35) + (10/35) = [(21 + 10)/35] = (31/35) Thanks