Least Common Multiple of 12/20, 78/28, 30/280

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Know Least Common Multiple of fractions 12/20, 78/28, 30/280 quickly i.e. 195 the smallest number that is divisible by all numbers by taking the help of LCM of Fractions Calculator.

Least Common Multiple (LCM) of 12/20, 78/28, 30/280 is 195.

LCM(12/20, 78/28, 30/280) = 195

LCM of 12/20, 78/28, 30/280

Enter two or more fractions separated by "commas"

Ex: 2/3, 5/7 or 3/5, 5/9, 7/3

LCM of:

Least Common Multiple of 12/20,78/28,30/280

Given numbers are 12/20,78/28,30/280

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 12,78,30

Least Common Multiple of Numerators i.e. LCM of 12,78,30 is 780.

GCF of Denominators means GCF of 20,28,280 as per the given fractions.

GCF of 20,28,280 is 4 as it is the largest common factor for these numbers.

Lets's calculate LCM of 12,78,30

LCM of Fractions 12/20,78/28,30/280 is 195

2 12, 78, 30
3 6, 39, 15
2, 13, 5

∴ So the LCM of the given numbers is 2 x 3 x 2 x 13 x 5 = 780

Least Common Multiple of 12,78,30 with GCF Formula

Least Common Multiple of 12,78,30 with GCF Formula

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 12,78,30 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(12,78,30) = 6

common factors(in case of two or more numbers have common factors) = 6

GCF(12,78,30) x common factors =6 x 6 = 36

LCM(12,78,30) = ( 12 × 78 × 30 ) / 36

LCM(12,78,30) = 28080 / 36

LCM(12,78,30) = 780


Lets's calculate GCF of 20,28,280

2 20, 28, 280
2 10, 14, 140
5, 7, 70

∴ So the GCF of the given numbers is 2 x 2 = 4

Thus LCM of Fractions = LCM of Numerators/GCF of Denominators = 780/4

Therefore the LCM of Fractions 12/20,78/28,30/280 is 195

Greatest Common Factor of 20,28,280 By Matching Biggest Common Factor Method

Greatest Common Factor of 20,28,280 By Matching Biggest Common Factor Method

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 28

List of positive integer factors of 28 that divides 28 without a remainder.

1,2,4,7,14,28

Factors of 280

List of positive integer factors of 280 that divides 280 without a remainder.

1,2,4,5,7,8,10,14,20,28,35,40,56,70,140,280

Greatest Common Factor

We found the factors 20,28,280 . The biggest common factor number is the GCF number.
So the greatest common factor 20,28,280 is 4.


LCM of Fractions Calculation Examples

Here are some samples of LCM of Fractions calculations.

LCM of Fractions Calculation Examples

Here are some samples of LCM of Fractions calculations.

Frequently Asked Questions on Fractional LCM of 12/20, 78/28, 30/280

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 12/20, 78/28, 30/280?

Answer: LCM of Numerators as per given numbers 12/20, 78/28, 30/280 is

LCM of Numerators i.e. for 12,78,30 is 780

GCF of denominators i.e. for 20,28,280 is 4.

Thus, LCM of Fractions is 195.Finally, LCM of Fractions for 12/20, 78/28, 30/280 is 195.