28
21
The least common denominator of five sixths and one fourth is: 12.
Fourteenths (eight and seven)
The LCD of 2/7 and 4/5 is 35.
8
12
20
one twelfth
That's the least common denominator or LCD.
4/7 and 3/5 have an LCD of 35 since they 7 and 5 have no common factors.
The least common denominator.
You can find this out in any of the following ways: 1. Find a common denominator (multiplying the two denominators is one way - it need not be the LEAST common denominator). Convert the fractions to this common denominator. Then you can compare. 2. Use a calculator to convert the fractions to decimal, then compare. To convert to decimal, just divide the top part of the fraction by the bottom part.