Greatest Common Factor of 7/9, 12/27, 21/81, 27/90

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

GCF of 7/9, 12/27, 21/81, 27/90

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 7/9,12/27,21/81,27/90

Given fractions are 7/9,12/27,21/81,27/90

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 7,12,21,27

Greatest Common Factor of Numerators i.e. GCF of 7,12,21,27 is 1 .

LCM of Denominators means LCM of 9,27,81,90 as per the given fractions.

LCM of 9,27,81,90 is 810 as it is the smallest common factor for both these numbers.

Lets's calculate GCF of 7,12,21,27

GCF of Fractions 7/9,12/27,21/81,27/90 is 1/810

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

Greatest Common Factor of 7,12,21,27 By Matching Biggest Common Factor Method

Greatest Common Factor of 7,12,21,27 By Matching Biggest Common Factor Method

Factors of 7

List of positive integer factors of 7 that divides 7 without a remainder.

1,7

Factors of 12

List of positive integer factors of 12 that divides 12 without a remainder.

1,2,3,4,6,12

Factors of 21

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

1,3,7,21

Factors of 27

List of positive integer factors of 27 that divides 27 without a remainder.

1,3,9,27

Greatest Common Factor

We found the factors 7,12,21,27 . The biggest common factor number is the GCF number.
So the greatest common factor 7,12,21,27 is 1.

Lets's calculate LCM of 9,27,81,90

3 9, 27, 81, 90
3 3, 9, 27, 30
3 1, 3, 9, 10
1, 1, 3, 10

∴ So the LCM of the given numbers is 3 x 3 x 3 x 1 x 1 x 3 x 10 = 810

Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 1/810

Therefore, the GCF of Fractions 7/9,12/27,21/81,27/90 is 1/810

Least Common Multiple of 9,27,81,90 with GCF Formula

Least Common Multiple of 9,27,81,90 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 9,27,81,90 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(9,27,81,90) = 9

common factors(in case of two or more numbers have common factors) = 243

GCF(9,27,81,90) x common factors =9 x 243 = 2187

LCM(9,27,81,90) = ( 9 × 27 × 81 × 90 ) / 2187

LCM(9,27,81,90) = 1771470 / 2187

LCM(9,27,81,90) = 810


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 7/9, 12/27, 21/81, 27/90

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 7/9, 12/27, 21/81, 27/90?

Answer: GCF of Numerators as per given numbers 7/9, 12/27, 21/81, 27/90 is

GCF of Numerators i.e. for 7,12,21,27 is 1

LCM of denominators i.e. for 9,27,81,90 is 810.

Thus, GCF of Fractions is 1/810.Finally, GCF of Fractions for 7/9, 12/27, 21/81, 27/90 is 1/810.