21
As 3 and 7 are relatively prime (their hcf = 1), their lcm is 3×7 = 21.
The lowest common denominator in this case would be 1.
There is none. A least common denominator is to be found between or among fractions. 3 and 7 are not fractions.
84/14 = 6 84/7 = 12 84/3 = 28 Hence 84 is the least common denominator
It is: 42
105
40
The Least Common Denominator of 3/4 and 7/8 is 8.
There is none. A least common denominator is to be found between or among fractions. 3 and 7 are not fractions.
84/14 = 6 84/7 = 12 84/3 = 28 Hence 84 is the least common denominator
1
21
It is: 42
105
The least common denominator is 28.
Least common denominator of 7 and 5 is 35.
It is: 84
42
40