LCD(28, 56) = 56.
1512
56
4536
7560
It is: 728
As 2 is a factor of 56, lcd(2, 56) = 56.
The Least Common Multiple (LCM) for 28 21 56 is 168.
The LCM of 28 and 56 is 56. Since 28 is a factor of 56, 56 is the LCM.
1/7 + 3/8 = 8/56 + 21/56 is the lowest common denominator.
The least common multiple of 8 , 28 = 56
56
8