lets write the problem info into an equation and solve step by step: 7(1/3 + 4/5) the minimum common multiple of 3 and 5 is 15, so we multiply and divide the fractions by a proper number to convert them to be divided by 15 so is easier to add them: (1/3)(5/5) = (1*5)/(3*5) = 5/15 (4/5)(3/3) = (4*3)/(5*3) = 12/15 so we substitute in the original equation: 7(1/3 + 4/5) = 7(5/15 + 12/15) = 7(17/15) = (7*17)/15 = 119/15
