To get the answer, you need to first find the common divisor of the denominators by multiplying all the three. That is 10 15 13 to get 1950. We multiply all the three denominators since there is no other common divisor. Therefore, when 1950 is divided by all the fractions it will be 195/1950 + 130/1950 ? 150/1950 which is 175/1950. When we simplify the answer by dividing the fraction with 5 the answer becomes 7/78.