Answer:
1. 2/3 and 9/11
multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33
multiples of 11: 11, 22, 33, 44, 55
the Least common multiples of 3 and 11 is 33.
Therefore, the LCD of 2/3 and 9/11 is 33.
2. 2/10 and 3/5
multiples of 10: 10, 20, 30, 40, 50, 60
multiples of 5: 5, 10, 15, 20, 25, 30
the lease common multiples of 10 and 5 is 10.
Therefore, the LCD of 2/10 and 3/5 is 10.
3. 4/8 and 1/6
multiples of 8: 8, 16, 24, 32, 40, 48, 56
multiples of 6: 6, 12, 18, 24, 30, 36
the least common multiples of 8 and 6 is 24.
therefore, the LCD of 4/8 and 1/6 is 24