20 is the lowest common denominator for 4 and 10.
4
20
Multiply 3*4 = 12
Start by finding a common denominator. If the radical includes the entire fraction (3/4 for the first part), the common denominator would be square root of 12.
20, although if you reduced 15/20 to 3/4, the common denominator would be 4.
20 is the lowest common denominator for 4 and 10.
4.
4
9
20
The LCD for 3/4 and 4/7 is 28.
The LCD of 3/4 and 4/5 is 20.
32 (8x4)
20
Multiply 3*4 = 12
Start by finding a common denominator. If the radical includes the entire fraction (3/4 for the first part), the common denominator would be square root of 12.