Greatest Common Factor of 27/11, 87/88, 81/32, 21/21

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

GCF of 27/11, 87/88, 81/32, 21/21

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 27/11,87/88,81/32,21/21

Given fractions are 27/11,87/88,81/32,21/21

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 27,87,81,21

Greatest Common Factor of Numerators i.e. GCF of 27,87,81,21 is 3 .

LCM of Denominators means LCM of 11,88,32,21 as per the given fractions.

LCM of 11,88,32,21 is 7392 as it is the smallest common factor for both these numbers.

Lets's calculate GCF of 27,87,81,21

GCF of Fractions 27/11,87/88,81/32,21/21 is 3/7392

3 27, 87, 81, 21
9, 29, 27, 7

∴ So the GCF of the given numbers is 3 = 3

Greatest Common Factor of 27,87,81,21 By Matching Biggest Common Factor Method

Greatest Common Factor of 27,87,81,21 By Matching Biggest Common Factor Method

Factors of 27

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

1,3,9,27

Factors of 87

List of positive integer factors of 87 that divides 87 without a remainder.

1,3,29,87

Factors of 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 21

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

1,3,7,21

Greatest Common Factor

We found the factors 27,87,81,21 . The biggest common factor number is the GCF number.
So the greatest common factor 27,87,81,21 is 3.

Lets's calculate LCM of 11,88,32,21

2 11, 88, 32, 21
2 11, 44, 16, 21
2 11, 22, 8, 21
11 11, 11, 4, 21
1, 1, 4, 21

∴ So the LCM of the given numbers is 2 x 2 x 2 x 11 x 1 x 1 x 4 x 21 = 7392

Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 3/7392

Therefore, the GCF of Fractions 27/11,87/88,81/32,21/21 is 3/7392

Least Common Multiple of 11,88,32,21 with GCF Formula

Least Common Multiple of 11,88,32,21 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 11,88,32,21 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(11,88,32,21) = 1

common factors(in case of two or more numbers have common factors) = 88

GCF(11,88,32,21) x common factors =1 x 88 = 88

LCM(11,88,32,21) = ( 11 × 88 × 32 × 21 ) / 88

LCM(11,88,32,21) = 650496 / 88

LCM(11,88,32,21) = 7392


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 27/11, 87/88, 81/32, 21/21

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 27/11, 87/88, 81/32, 21/21?

Answer: GCF of Numerators as per given numbers 27/11, 87/88, 81/32, 21/21 is

GCF of Numerators i.e. for 27,87,81,21 is 3

LCM of denominators i.e. for 11,88,32,21 is 7392.

Thus, GCF of Fractions is 3/7392.Finally, GCF of Fractions for 27/11, 87/88, 81/32, 21/21 is 3/7392.