EXPLANATION
The least common denominator of a,b is the smallest positive number that is divisible by both a and b.
First, let's factorize both denominators as follows:
Prime factorization of 2: 2
2 is a primer number, therefore no factorization is possible.
Primer factorization of 7: 7
7 is a primer number, therefore no factorization is possible.
Multiply each factor the greatest number of times it occurs in either 2 or 7.
=2*7
Multiply the numbers:
=14
So, the least common denominator is 14