Least Common Multiple of 21/40, 51/42, 63/22

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Know Least Common Multiple of fractions 21/40, 51/42, 63/22 quickly i.e. 1071/2 the smallest number that is divisible by all numbers by taking the help of LCM of Fractions Calculator.

Least Common Multiple (LCM) of 21/40, 51/42, 63/22 is 1071/2.

LCM(21/40, 51/42, 63/22) = 1071/2

LCM of 21/40, 51/42, 63/22

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 21/40,51/42,63/22

Given numbers are 21/40,51/42,63/22

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 21,51,63

Least Common Multiple of Numerators i.e. LCM of 21,51,63 is 1071.

GCF of Denominators means GCF of 40,42,22 as per the given fractions.

GCF of 40,42,22 is 2 as it is the largest common factor for these numbers.

Lets's calculate LCM of 21,51,63

LCM of Fractions 21/40,51/42,63/22 is 1071/2

3 21, 51, 63
7 7, 17, 21
1, 17, 3

∴ So the LCM of the given numbers is 3 x 7 x 1 x 17 x 3 = 1071

Least Common Multiple of 21,51,63 with GCF Formula

Least Common Multiple of 21,51,63 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 21,51,63 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(21,51,63) = 3

common factors(in case of two or more numbers have common factors) = 21

GCF(21,51,63) x common factors =3 x 21 = 63

LCM(21,51,63) = ( 21 × 51 × 63 ) / 63

LCM(21,51,63) = 67473 / 63

LCM(21,51,63) = 1071


Lets's calculate GCF of 40,42,22

2 40, 42, 22
20, 21, 11

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

Thus LCM of Fractions = LCM of Numerators/GCF of Denominators = 1071/2

Therefore the LCM of Fractions 21/40,51/42,63/22 is 1071/2

Greatest Common Factor of 40,42,22 By Matching Biggest Common Factor Method

Greatest Common Factor of 40,42,22 By Matching Biggest Common Factor Method

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 42

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

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

Factors of 22

List of positive integer factors of 22 that divides 22 without a remainder.

1,2,11,22

Greatest Common Factor

We found the factors 40,42,22 . The biggest common factor number is the GCF number.
So the greatest common factor 40,42,22 is 2.


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 21/40, 51/42, 63/22

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 21/40, 51/42, 63/22?

Answer: LCM of Numerators as per given numbers 21/40, 51/42, 63/22 is

LCM of Numerators i.e. for 21,51,63 is 1071

GCF of denominators i.e. for 40,42,22 is 2.

Thus, LCM of Fractions is 1071/2.Finally, LCM of Fractions for 21/40, 51/42, 63/22 is 1071/2.