Least Common Multiple of 81/640, 40/160

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Know Least Common Multiple of fractions 81/640, 40/160 quickly i.e. 3240/160 the smallest number that is divisible by all numbers by taking the help of LCM of Fractions Calculator.

Least Common Multiple (LCM) of 81/640, 40/160 is 3240/160.

LCM(81/640, 40/160) = 3240/160

LCM of 81/640, 40/160

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 81/640,40/160

Given numbers are 81/640,40/160

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 81,40

Least Common Multiple of Numerators i.e. LCM of 81,40 is 3240.

GCF of Denominators means GCF of 640,160 as per the given fractions.

GCF of 640,160 is 160 as it is the largest common factor for these numbers.

Lets's calculate LCM of 81,40

LCM of Fractions 81/640,40/160 is 3240/160

Given numbers has no common factors except 1. So, there LCM is their product i.e 3240

Least Common Multiple of 81,40 with GCF Formula

Least Common Multiple of 81,40 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 81,40 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(81,40) = 1

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

GCF(81,40) x common factors =1 x 1 = 1

LCM(81,40) = ( 81 × 40 ) / 1

LCM(81,40) = 3240 / 1

LCM(81,40) = 3240


Lets's calculate GCF of 640,160

2 640, 160
2 320, 80
2 160, 40
2 80, 20
2 40, 10
5 20, 5
4, 1

∴ So the GCF of the given numbers is 2 x 2 x 2 x 2 x 2 x 5 = 160

Thus LCM of Fractions = LCM of Numerators/GCF of Denominators = 3240/160

Therefore the LCM of Fractions 81/640,40/160 is 3240/160

Greatest Common Factor of 640,160 By Matching Biggest Common Factor Method

Greatest Common Factor of 640,160 By Matching Biggest Common Factor Method

Factors of 640

List of positive integer factors of 640 that divides 640 without a remainder.

1,2,4,5,8,10,16,20,32,40,64,80,128,160,320,640

Factors of 160

List of positive integer factors of 160 that divides 160 without a remainder.

1,2,4,5,8,10,16,20,32,40,80,160

Greatest Common Factor

We found the factors 640,160 . The biggest common factor number is the GCF number.
So the greatest common factor 640,160 is 160.


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 81/640, 40/160

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 81/640, 40/160?

Answer: LCM of Numerators as per given numbers 81/640, 40/160 is

LCM of Numerators i.e. for 81,40 is 3240

GCF of denominators i.e. for 640,160 is 160.

Thus, LCM of Fractions is 3240/160.Finally, LCM of Fractions for 81/640, 40/160 is 3240/160.