It is: 63
LCD(9, 3) = 9
LCD(7, 9, 2) = 126.
LCD(7,9,13) = 7*9*13 which is 819
3
lcm(7, 9) = 63 → equivalent fractions are: 3/7 = (3×9)/(7×9) = 27/63 2/9 = (2×7)/(9×7) = 14/63
63
63
9
63
9 by 5- 3 by 3 by 5 9 by 7 - 3 by 3 by 7 7 by 7. you need to go to The Tutoring Center, I used to work there, Lowest Common Denominators are in the first few pages of their workbooks. The LCD for those three numbers is one. They don't share any other factors
9 = 3^2 15 = 3 x 5 21 = 3 x 7 lcm = 3^2 x 5 x 7 = 315
If you mean lcm, it is 36 because 9 x 4 equals 36 and 3 x 12 equals 36.