It is: 315
LCD(63, 7) = 63.
63
63
If you mean lcm, it is 36 because 9 x 4 equals 36 and 3 x 12 equals 36.
LCD(9, 21) = 63
For 49,57: 2793 For 4/9, 5/7: 63
126
63
The answer is 1
252
63
It has to be 7x9 or 63 or less. There is no number less than 63 which is divisible by both 7 and 9 therefore 63 is the LCD.