Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Know Least Common Multiple of fractions 99/78, 45/51, 640/84 quickly i.e. 21120 the smallest number that is divisible by all numbers by taking the help of LCM of Fractions Calculator.
Least Common Multiple (LCM) of 99/78, 45/51, 640/84 is 21120.
LCM(99/78, 45/51, 640/84) = 21120
Enter two or more fractions separated by "commas"
Ex: 2/3, 5/7 or 3/5, 5/9, 7/3
Given numbers are 99/78,45/51,640/84
Formula to find LCM of Fractions is
LCM = LCM of Numerators/GCF of Denominators
As per the formula LCM of Fractions let’s split into two parts and find the LCM of Numerators and GCF of Denominators
In the given fractions LCM of Numerators means LCM of 99,45,640
Least Common Multiple of Numerators i.e. LCM of 99,45,640 is 63360.
GCF of Denominators means GCF of 78,51,84 as per the given fractions.
GCF of 78,51,84 is 3 as it is the largest common factor for these numbers.
Lets's calculate LCM of 99,45,640
3 | 99, 45, 640 |
3 | 33, 15, 640 |
5 | 11, 5, 640 |
11, 1, 128 |
∴ So the LCM of the given numbers is 3 x 3 x 5 x 11 x 1 x 128 = 63360
The formula of LCM is LCM(a1,a2,a3....,an) = ( a1 × a2 × a3 × .... × an) / GCF(a1,a2,a3....,an) x common factors(if more than 2 numbers have common factors).
We need to calculate greatest common factor of 99,45,640 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(99,45,640) = 1
common factors(in case of two or more numbers have common factors) = 45
GCF(99,45,640) x common factors =1 x 45 = 45
LCM(99,45,640) = ( 99 × 45 × 640 ) / 45
LCM(99,45,640) = 2851200 / 45
LCM(99,45,640) = 63360
Lets's calculate GCF of 78,51,84
3 | 78, 51, 84 |
26, 17, 28 |
∴ So the GCF of the given numbers is 3 = 3
Thus LCM of Fractions = LCM of Numerators/GCF of Denominators = 63360/3
Therefore the LCM of Fractions 99/78,45/51,640/84 is 21120
Factors of 78
List of positive integer factors of 78 that divides 78 without a remainder.
1,2,3,6,13,26,39,78
Factors of 51
List of positive integer factors of 51 that divides 51 without a remainder.
1,3,17,51
Factors of 84
List of positive integer factors of 84 that divides 84 without a remainder.
1,2,3,4,6,7,12,14,21,28,42,84
Greatest Common Factor
We found the factors 78,51,84 . The biggest common factor number is the GCF number.
So the greatest common factor 78,51,84 is 3.
Here are some samples of LCM of Fractions calculations.
Here are some samples of LCM of Fractions calculations.
1. How to find LCM in Fractions?
Answer: LCM of fractions can be found using the simple formula LCM of Fractions = LCM of Numerators/GCF of Denominators.
2. What is the LCM of Fractions for 99/78, 45/51, 640/84?
Answer: LCM of Numerators as per given numbers 99/78, 45/51, 640/84 is
LCM of Numerators i.e. for 99,45,640 is 63360
GCF of denominators i.e. for 78,51,84 is 3.
Thus, LCM of Fractions is 21120.Finally, LCM of Fractions for 99/78, 45/51, 640/84 is 21120.