To find your answer have to find the LCD ( least common denominator ) of the mixed numbers, find the equivalent fractions, add or subtract the fractions and add the whole numbers.
Last step is to write your answer in lowest terms.
Well a yard is 3 ft so divide 3 into 13 3 goes into 13 4 times and you get 12 you have 4 whole yards and 1 ft left or 1/3 of a yard. :) hoped this helped
