Greatest Common Factor of 38/71, 42/87, 86/21, 20/42

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

GCF of 38/71, 42/87, 86/21, 20/42

Enter two or more fractions separated by "commas"

Ex: 2/3, 5/7 or 3/5, 5/9, 7/3

GCF of:

Greatest Common Factor of 38/71,42/87,86/21,20/42

Given fractions are 38/71,42/87,86/21,20/42

Formula to find GCF of Fractions is

GCF = GCF of Numerators/LCM of Denominators

As per the formula GCF of Fractions let’s split into two parts and find the GCF of Numerators and LCM of Denominators

In the given fractions GCF of Numerators means GCF of 38,42,86,20

Greatest Common Factor of Numerators i.e. GCF of 38,42,86,20 is 2 .

LCM of Denominators means LCM of 71,87,21,42 as per the given fractions.

LCM of 71,87,21,42 is 86478 as it is the smallest common factor for both these numbers.

Lets's calculate GCF of 38,42,86,20

GCF of Fractions 38/71,42/87,86/21,20/42 is 2/86478

2 38, 42, 86, 20
19, 21, 43, 10

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

Greatest Common Factor of 38,42,86,20 By Matching Biggest Common Factor Method

Greatest Common Factor of 38,42,86,20 By Matching Biggest Common Factor Method

Factors of 38

List of positive integer factors of 38 that divides 38 without a remainder.

1,2,19,38

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 86

List of positive integer factors of 86 that divides 86 without a remainder.

1,2,43,86

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Greatest Common Factor

We found the factors 38,42,86,20 . The biggest common factor number is the GCF number.
So the greatest common factor 38,42,86,20 is 2.

Lets's calculate LCM of 71,87,21,42

3 71, 87, 21, 42
7 71, 29, 7, 14
71, 29, 1, 2

∴ So the LCM of the given numbers is 3 x 7 x 71 x 29 x 1 x 2 = 86478

Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 2/86478

Therefore, the GCF of Fractions 38/71,42/87,86/21,20/42 is 2/86478

Least Common Multiple of 71,87,21,42 with GCF Formula

Least Common Multiple of 71,87,21,42 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 71,87,21,42 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(71,87,21,42) = 1

common factors(in case of two or more numbers have common factors) = 63

GCF(71,87,21,42) x common factors =1 x 63 = 63

LCM(71,87,21,42) = ( 71 × 87 × 21 × 42 ) / 63

LCM(71,87,21,42) = 5448114 / 63

LCM(71,87,21,42) = 86478


GCF of Fractions Calculation Examples

Here are some samples of GCF of Fractions calculations.

GCF of Fractions Calculation Examples

Here are some samples of GCF of Fractions calculations.

Frequently Asked Questions on Fractional GCF of 38/71, 42/87, 86/21, 20/42

1. How to find GCF in Fractions?

Answer: GCF of fractions can be found using the simple formula GCF of Fractions = GCF of Numerators/LCM of Denominators.

2. What is the GCF of Fractions for 38/71, 42/87, 86/21, 20/42?

Answer: GCF of Numerators as per given numbers 38/71, 42/87, 86/21, 20/42 is

GCF of Numerators i.e. for 38,42,86,20 is 2

LCM of denominators i.e. for 71,87,21,42 is 86478.

Thus, GCF of Fractions is 2/86478.Finally, GCF of Fractions for 38/71, 42/87, 86/21, 20/42 is 2/86478.