Least Common Multiple of 42/56, 97/40, 81/84

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Know Least Common Multiple of fractions 42/56, 97/40, 81/84 quickly i.e. 109998/4 the smallest number that is divisible by all numbers by taking the help of LCM of Fractions Calculator.

Least Common Multiple (LCM) of 42/56, 97/40, 81/84 is 109998/4.

LCM(42/56, 97/40, 81/84) = 109998/4

LCM of 42/56, 97/40, 81/84

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 42/56,97/40,81/84

Given numbers are 42/56,97/40,81/84

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 42,97,81

Least Common Multiple of Numerators i.e. LCM of 42,97,81 is 109998.

GCF of Denominators means GCF of 56,40,84 as per the given fractions.

GCF of 56,40,84 is 4 as it is the largest common factor for these numbers.

Lets's calculate LCM of 42,97,81

LCM of Fractions 42/56,97/40,81/84 is 109998/4

3 42, 97, 81
14, 97, 27

∴ So the LCM of the given numbers is 3 x 14 x 97 x 27 = 109998

Least Common Multiple of 42,97,81 with GCF Formula

Least Common Multiple of 42,97,81 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 42,97,81 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(42,97,81) = 1

common factors(in case of two or more numbers have common factors) = 3

GCF(42,97,81) x common factors =1 x 3 = 3

LCM(42,97,81) = ( 42 × 97 × 81 ) / 3

LCM(42,97,81) = 329994 / 3

LCM(42,97,81) = 109998


Lets's calculate GCF of 56,40,84

2 56, 40, 84
2 28, 20, 42
14, 10, 21

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

Thus LCM of Fractions = LCM of Numerators/GCF of Denominators = 109998/4

Therefore the LCM of Fractions 42/56,97/40,81/84 is 109998/4

Greatest Common Factor of 56,40,84 By Matching Biggest Common Factor Method

Greatest Common Factor of 56,40,84 By Matching Biggest Common Factor Method

Factors of 56

List of positive integer factors of 56 that divides 56 without a remainder.

1,2,4,7,8,14,28,56

Factors of 40

List of positive integer factors of 40 that divides 40 without a remainder.

1,2,4,5,8,10,20,40

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 56,40,84 . The biggest common factor number is the GCF number.
So the greatest common factor 56,40,84 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 42/56, 97/40, 81/84

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 42/56, 97/40, 81/84?

Answer: LCM of Numerators as per given numbers 42/56, 97/40, 81/84 is

LCM of Numerators i.e. for 42,97,81 is 109998

GCF of denominators i.e. for 56,40,84 is 4.

Thus, LCM of Fractions is 109998/4.Finally, LCM of Fractions for 42/56, 97/40, 81/84 is 109998/4.