You can put this solution on YOUR website! 35 factors to 5 x 7.
56 factors to 7 x 2 x 2 x 2.
LCD is defined as the greatest set of a prime number from all factors all multiplied together.
In this case, it is 5 x 7 x 2 x 2 x 2 = 280.
The fraction you multiply by 8, the second by 5. Doing so, and adding you get your answer as shown below.