There IS only one LCD. The word least is a superlative, which means there can be only one.
LCD(79, 90) = 7110
630
the LCD of 2, 9 and 5 = 90
90
LCD(5, 18) = 90
945
the LCD of 5 and 7 is explanation: 7: 14, 21, 28, 35, 42, 49, 56, 63, 70 5: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 so the LCD is 5 and7 is 35
LCD(90, 72) = 360
the LCD of 2, 9 and 5 = 90
35
35% of 90:= 35% * 90= 0.35 * 90= 31.5
It is: 630
420
105
35
90
180
90
5 is a factor of 35, so the LCD is 35.