LCD of Calculator
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
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 128,639,399
We can find the LCD of numbers 128,639,399 by the prime factorization method or by applying the LCD formula.
The LCD of 128,639,399 is 10878336.
Method to Find Least Common Denominator of 128,639,399 with Prime Factorization
| 3 | 128, 639, 399 |
| 128, 213, 133 |
As you can see, now we have to multiply the prime numbers on the left side with the co-primes at the bottom.
3 x 128 x 213 x 133 = 10878336
Thus, we have determined that the LCD of 128,639,399 is 10878336
The LCD formula is LCD(a,b) = ( a x b) / GCF(a,b)
Step1:
Find the GCF of 128 and 639. To find the GCF, list down the factors of 128 and 639 and select the highest factor that appears in both lists of factors.
128 : [1, 2, 4, 8, 16, 32, 64, 128]
639 : [1, 3, 9, 71, 213, 639]
From this, we can see that the GCF of 128 and 639 is 1.
Now, put this into the LCD formula.
LCD(128, 639) = ( 128 x 639 ) / 1
LCD(128, 639) = 81792 / 1
LCD(128, 639) = 81792
Step2:
Find the GCF of 81792 and 399. To find the GCF, list down the factors of 81792 and 399 and select the highest factor that appears in both lists of factors.
81792 : [1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 64, 71, 72, 96, 128, 142, 144, 192, 213, 284, 288, 384, 426, 568, 576, 639, 852, 1136, 1152, 1278, 1704, 2272, 2556, 3408, 4544, 5112, 6816, 9088, 10224, 13632, 20448, 27264, 40896, 81792]
399 : [1, 3, 7, 19, 21, 57, 133, 399]
From this, we can see that the GCF of 81792 and 399 is 3.
Now, put this into the LCD formula.
LCD(81792, 399) = ( 81792 x 399 ) / 3
LCD(81792, 399) = 32635008 / 3
LCD(81792, 399) = 10878336
LCD of 128,639,399 is 10878336
LCD of Numbers Calculation Examples
Here are some samples of LCD of Numbers calculations.
Frequently Asked Questions on LCD of
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 .