The common denominator of 5 over 8 and 4 over 9 is 72.
20
It is 72.
20
The LCD of 5/4 and 5/6 is 12.
The LCD of 3/4 and 4/5 is 20.
The LCD for 4/7 and 3/5 is 35.
63
20
The LCDis36.
The LCD for 5/9 and 4/5 is 45.
The LCD for 1/5 and 4/15 is 15.
The LCD of 5/6 and 1/4 is 12.