There is no exact least common denominator. Six does not go into 38
The least common denominator is 38*7 = 266.
38 is.
There doesn't appear to be any fractions there but to find the LCD of fractions is done in the same way as finding the lowest common multiple of numbers.
1862
1064
LCD of 38 and 43 is 1
LCD(117, 38) = 4446.
The LCD for 19 and 2 is 38
456
The lowest common factor of any set of positive integers is 1.
38/41 is the lowest term.
The least common factor is: 1