but no hellop
LCD(9, 15) = 45
245
the answer is 45. You compute it by reducing each number to its prime factors, and taking the unique set. 9 factors to 3x3, 15 to 3x5, so the unique set is one 3 from the 9, one 3 that they share and one 5 from the 15. 3x3x5=45. Of course, 135 is also a common denominator but isn't the least. you can always find a CD by multiplying the two. The LCD will make simplification after the addition or subtraction of fractions much easier.
LCD (Least Common Divisor) is not a normal term. LCM (Least Common Multiple) is, as well as GCD (Greatest Common Divisor). The LCM of 10 and 25 is 50, while the GCD of 10 and 50 is 10. I suppose if you were really looking for the LCD of 10 and 25, it is 5.
the LCD of 2, 9 and 5 = 90
LCD is 10 so: 9/10-5/10 = 4/10 = 2/5 in its lowest terms
(9 + 15) / (15 - 10) = 24 / 5 = 4.8
lcm(9, 10) = 90.
The LCD or LCM is 360
360
9 = 3^2 15 = 3 x 5 21 = 3 x 7 lcm = 3^2 x 5 x 7 = 315
6/10 + 3/9 = 3/5 + 1/3 = 9/15 + 5/15 = 14/15