Least Common Multiple of 40/21, 40/77, 84/61, 83/407

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Know Least Common Multiple of fractions 40/21, 40/77, 84/61, 83/407 quickly i.e. 69720 the smallest number that is divisible by all numbers by taking the help of LCM of Fractions Calculator.

Least Common Multiple (LCM) of 40/21, 40/77, 84/61, 83/407 is 69720.

LCM(40/21, 40/77, 84/61, 83/407) = 69720

LCM of 40/21, 40/77, 84/61, 83/407

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 40/21,40/77,84/61,83/407

Given numbers are 40/21,40/77,84/61,83/407

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 40,40,84,83

Least Common Multiple of Numerators i.e. LCM of 40,40,84,83 is 69720.

GCF of Denominators means GCF of 21,77,61,407 as per the given fractions.

GCF of 21,77,61,407 is 1 as it is the largest common factor for these numbers.

Lets's calculate LCM of 40,40,84,83

LCM of Fractions 40/21,40/77,84/61,83/407 is 69720

2 40, 40, 84, 83
2 20, 20, 42, 83
2 10, 10, 21, 83
5 5, 5, 21, 83
1, 1, 21, 83

∴ So the LCM of the given numbers is 2 x 2 x 2 x 5 x 1 x 1 x 21 x 83 = 69720

Least Common Multiple of 40,40,84,83 with GCF Formula

Least Common Multiple of 40,40,84,83 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 40,40,84,83 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(40,40,84,83) = 1

common factors(in case of two or more numbers have common factors) = 160

GCF(40,40,84,83) x common factors =1 x 160 = 160

LCM(40,40,84,83) = ( 40 × 40 × 84 × 83 ) / 160

LCM(40,40,84,83) = 11155200 / 160

LCM(40,40,84,83) = 69720


Lets's calculate GCF of 21,77,61,407

∴ So GCF of numbers is 1 because of no common factors present between them.

Thus LCM of Fractions = LCM of Numerators/GCF of Denominators = 69720/1

Therefore the LCM of Fractions 40/21,40/77,84/61,83/407 is 69720

Greatest Common Factor of 21,77,61,407 By Matching Biggest Common Factor Method

Greatest Common Factor of 21,77,61,407 By Matching Biggest Common Factor Method

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 77

List of positive integer factors of 77 that divides 77 without a remainder.

1,7,11,77

Factors of 61

List of positive integer factors of 61 that divides 61 without a remainder.

1,61

Factors of 407

List of positive integer factors of 407 that divides 407 without a remainder.

1,11,37,407

Greatest Common Factor

We found the factors 21,77,61,407 . The biggest common factor number is the GCF number.
So the greatest common factor 21,77,61,407 is 1.


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 40/21, 40/77, 84/61, 83/407

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 40/21, 40/77, 84/61, 83/407?

Answer: LCM of Numerators as per given numbers 40/21, 40/77, 84/61, 83/407 is

LCM of Numerators i.e. for 40,40,84,83 is 69720

GCF of denominators i.e. for 21,77,61,407 is 1.

Thus, LCM of Fractions is 69720.Finally, LCM of Fractions for 40/21, 40/77, 84/61, 83/407 is 69720.