Read this article to figure out how to calculate the lowest common denominator of . Learn the two different methods that you can use to find the LCD: the prime factorization method and the LCD formula method. We will explain both these methods in detail so stick around until the very end to understand. Utilise our free LCD Calculator to avail the LCD of numbers easily.
Given numbers are 428,389,864
We can find the LCD of numbers 428,389,864 by the prime factorization method or by applying the LCD formula.
The LCD of 428,389,864 is 35962272.
2 | 428, 389, 864 |
2 | 214, 389, 432 |
107, 389, 216 |
As you can see, now we have to multiply the prime numbers on the left side with the co-primes at the bottom.
2 x 2 x 107 x 389 x 216 = 35962272
Thus, we have determined that the LCD of 428,389,864 is 35962272
The LCD formula is LCD(a,b) = ( a x b) / GCF(a,b)
Step1:
Find the GCF of 428 and 389. To find the GCF, list down the factors of 428 and 389 and select the highest factor that appears in both lists of factors.
428 : [1, 2, 4, 107, 214, 428]
389 : [1, 389]
From this, we can see that the GCF of 428 and 389 is 1.
Now, put this into the LCD formula.
LCD(428, 389) = ( 428 x 389 ) / 1
LCD(428, 389) = 166492 / 1
LCD(428, 389) = 166492
Step2:
Find the GCF of 166492 and 864. To find the GCF, list down the factors of 166492 and 864 and select the highest factor that appears in both lists of factors.
166492 : [1, 2, 4, 107, 214, 389, 428, 778, 1556, 41623, 83246, 166492]
864 : [1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 32, 36, 48, 54, 72, 96, 108, 144, 216, 288, 432, 864]
From this, we can see that the GCF of 166492 and 864 is 4.
Now, put this into the LCD formula.
LCD(166492, 864) = ( 166492 x 864 ) / 4
LCD(166492, 864) = 143849088 / 4
LCD(166492, 864) = 35962272
LCD of 428,389,864 is 35962272
Here are some samples of LCD of Numbers calculations.
1. What is the LCD of ?
Answer: LCD of is .
2. How to find LCD of using prime factorization ?
Answer: Just keep dividing by prime numbers until only co-primes are left over. At that point, simply multiply the co-primes with the prime numbers on the left. The answer will be , the LCD.
3. How to Find the LCD of using LCD formula ?
Answer: The LCD formula is LCD(a,b) = ( a x b) / GCF(a,b).
You must first calculate the LCD OF and . Then, find the LCD of that answer and and so on. The answer will be , which is the LCD of .