Least Common Multiple of 18/74, 42/79, 15/15, 21/666

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Know Least Common Multiple of fractions 18/74, 42/79, 15/15, 21/666 quickly i.e. 630 the smallest number that is divisible by all numbers by taking the help of LCM of Fractions Calculator.

Least Common Multiple (LCM) of 18/74, 42/79, 15/15, 21/666 is 630.

LCM(18/74, 42/79, 15/15, 21/666) = 630

LCM of 18/74, 42/79, 15/15, 21/666

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 18/74,42/79,15/15,21/666

Given numbers are 18/74,42/79,15/15,21/666

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 18,42,15,21

Least Common Multiple of Numerators i.e. LCM of 18,42,15,21 is 630.

GCF of Denominators means GCF of 74,79,15,666 as per the given fractions.

GCF of 74,79,15,666 is 1 as it is the largest common factor for these numbers.

Lets's calculate LCM of 18,42,15,21

LCM of Fractions 18/74,42/79,15/15,21/666 is 630

2 18, 42, 15, 21
3 9, 21, 15, 21
7 3, 7, 5, 7
3, 1, 5, 1

∴ So the LCM of the given numbers is 2 x 3 x 7 x 3 x 1 x 5 x 1 = 630

Least Common Multiple of 18,42,15,21 with GCF Formula

Least Common Multiple of 18,42,15,21 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 18,42,15,21 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(18,42,15,21) = 3

common factors(in case of two or more numbers have common factors) = 126

GCF(18,42,15,21) x common factors =3 x 126 = 378

LCM(18,42,15,21) = ( 18 × 42 × 15 × 21 ) / 378

LCM(18,42,15,21) = 238140 / 378

LCM(18,42,15,21) = 630


Lets's calculate GCF of 74,79,15,666

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

Thus LCM of Fractions = LCM of Numerators/GCF of Denominators = 630/1

Therefore the LCM of Fractions 18/74,42/79,15/15,21/666 is 630

Greatest Common Factor of 74,79,15,666 By Matching Biggest Common Factor Method

Greatest Common Factor of 74,79,15,666 By Matching Biggest Common Factor Method

Factors of 74

List of positive integer factors of 74 that divides 74 without a remainder.

1,2,37,74

Factors of 79

List of positive integer factors of 79 that divides 79 without a remainder.

1,79

Factors of 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Factors of 666

List of positive integer factors of 666 that divides 666 without a remainder.

1,2,3,6,9,18,37,74,111,222,333,666

Greatest Common Factor

We found the factors 74,79,15,666 . The biggest common factor number is the GCF number.
So the greatest common factor 74,79,15,666 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 18/74, 42/79, 15/15, 21/666

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 18/74, 42/79, 15/15, 21/666?

Answer: LCM of Numerators as per given numbers 18/74, 42/79, 15/15, 21/666 is

LCM of Numerators i.e. for 18,42,15,21 is 630

GCF of denominators i.e. for 74,79,15,666 is 1.

Thus, LCM of Fractions is 630.Finally, LCM of Fractions for 18/74, 42/79, 15/15, 21/666 is 630.