The LCM is 952.
952
4536
7560
1/7 + 3/8 = 8/56 + 21/56 is the lowest common denominator.
504 9*56 = 504 8*63 = 504
These numbers have no common factor so the LCM is their product, ie 2632.
LCD(28, 56) = 56.
It is: 728
1512
56
4536
7560
As 2 is a factor of 56, lcd(2, 56) = 56.
1/7 + 3/8 = 8/56 + 21/56 is the lowest common denominator.
56
8
504 9*56 = 504 8*63 = 504
The least common denominator is 24.