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Q: What is the LCD of 5 over 18 and 4 over 15?

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60

The LCD for 1/5 and 4/15 is 15.

60

lowest common denominator of 4/5 and 7/15 would be 15 4/5=12/15

LCD(9, 6) = 18

2

4/9 = 8/18 5/6 = 15/18 8/18 + 15/18 = 23/18

15

LCD(4, 10) = 20

36

5/6 - 4/9 = 15/18 - 8/18 = 7/185/6 - 4/9 = 15/18 - 8/18 = 7/185/6 - 4/9 = 15/18 - 8/18 = 7/185/6 - 4/9 = 15/18 - 8/18 = 7/18

The LCD of 13, 14 and 15 is 2730 The LCD of 1/3, 1/4 and 1/5 is 60

36

4

15

60

That's a total of 18.

LCD(9, 3y) = 9y

13/15 − 4/6 = 18/90 which reduces to 1/5

LCD(18, 4, 20) = 180

5/6 + 4/9 = ? 15/18 + 8/18 = 23/18 or 1 5/18 or 1.28

4

To find an LCD, you need to have at least two denominators.

LCD(15, 12, 4) = 60.

28 is the LCD