The common denominator of 5 over 8 and 4 over 9 is 72.
The LCD for 5/9 and 4/5 is 45.
It is 72.
The greatest common denominator of any set of denominators is infinite.
The LCDis36.
63
9 is the common denominator. 2/3 = 6/9.
5
It is 36.
1
LCD(9, 6) = 18
If that's 6/4 and 9/5, the least common denominator is 20.