Question 202850
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.

*[invoke explain_simplification "16/35+11/56" ]

I hope this helps. Feel free to leave feedback with comments and concerns.  =)