There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of a pair of fractions.
A common denominator, though not the least, is 80.
80
To subtract these fractions, you need to find a common denominator. The least common multiple of 16 and 20 is 80. Converting 5/16 and 3/20 to have a denominator of 80, we have 25/80 and 12/80. Subtracting 12/80 from 25/80 gives us 13/80 as the result.
1360
The Least Common Multiple (LCM) for 4 16 and 20 is 80.
A common denominator, though not the least, is 80.
80
A common denominator, though not the least, is 80.
It is: 240
80
It is 80
It is: 80
80
The least common denominator of 16 and 5 is 80
80
LCD(70, 80) = 560
80