Least Common Multiple of 56/42, 81/57, 31/45

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Know Least Common Multiple of fractions 56/42, 81/57, 31/45 quickly i.e. 46872 the smallest number that is divisible by all numbers by taking the help of LCM of Fractions Calculator.

Least Common Multiple (LCM) of 56/42, 81/57, 31/45 is 46872.

LCM(56/42, 81/57, 31/45) = 46872

LCM of 56/42, 81/57, 31/45

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 56/42,81/57,31/45

Given numbers are 56/42,81/57,31/45

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 56,81,31

Least Common Multiple of Numerators i.e. LCM of 56,81,31 is 140616.

GCF of Denominators means GCF of 42,57,45 as per the given fractions.

GCF of 42,57,45 is 3 as it is the largest common factor for these numbers.

Lets's calculate LCM of 56,81,31

LCM of Fractions 56/42,81/57,31/45 is 46872

Given numbers has no common factors except 1. So, there LCM is their product i.e 140616

Least Common Multiple of 56,81,31 with GCF Formula

Least Common Multiple of 56,81,31 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 56,81,31 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(56,81,31) = 1

common factors(in case of two or more numbers have common factors) = 1

GCF(56,81,31) x common factors =1 x 1 = 1

LCM(56,81,31) = ( 56 × 81 × 31 ) / 1

LCM(56,81,31) = 140616 / 1

LCM(56,81,31) = 140616


Lets's calculate GCF of 42,57,45

3 42, 57, 45
14, 19, 15

∴ So the GCF of the given numbers is 3 = 3

Thus LCM of Fractions = LCM of Numerators/GCF of Denominators = 140616/3

Therefore the LCM of Fractions 56/42,81/57,31/45 is 46872

Greatest Common Factor of 42,57,45 By Matching Biggest Common Factor Method

Greatest Common Factor of 42,57,45 By Matching Biggest Common Factor Method

Factors of 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 57

List of positive integer factors of 57 that divides 57 without a remainder.

1,3,19,57

Factors of 45

List of positive integer factors of 45 that divides 45 without a remainder.

1,3,5,9,15,45

Greatest Common Factor

We found the factors 42,57,45 . The biggest common factor number is the GCF number.
So the greatest common factor 42,57,45 is 3.


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 56/42, 81/57, 31/45

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 56/42, 81/57, 31/45?

Answer: LCM of Numerators as per given numbers 56/42, 81/57, 31/45 is

LCM of Numerators i.e. for 56,81,31 is 140616

GCF of denominators i.e. for 42,57,45 is 3.

Thus, LCM of Fractions is 46872.Finally, LCM of Fractions for 56/42, 81/57, 31/45 is 46872.