Greatest Common Factor of 90/28, 52/72, 49/54, 21/91

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

GCF of 90/28, 52/72, 49/54, 21/91

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 90/28,52/72,49/54,21/91

Given fractions are 90/28,52/72,49/54,21/91

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 90,52,49,21

Greatest Common Factor of Numerators i.e. GCF of 90,52,49,21 is 1 .

LCM of Denominators means LCM of 28,72,54,91 as per the given fractions.

LCM of 28,72,54,91 is 19656 as it is the smallest common factor for both these numbers.

Lets's calculate GCF of 90,52,49,21

GCF of Fractions 90/28,52/72,49/54,21/91 is 1/19656

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

Greatest Common Factor of 90,52,49,21 By Matching Biggest Common Factor Method

Greatest Common Factor of 90,52,49,21 By Matching Biggest Common Factor Method

Factors of 90

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

Factors of 52

List of positive integer factors of 52 that divides 52 without a remainder.

1,2,4,13,26,52

Factors of 49

List of positive integer factors of 49 that divides 49 without a remainder.

1,7,49

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 90,52,49,21 . The biggest common factor number is the GCF number.
So the greatest common factor 90,52,49,21 is 1.

Lets's calculate LCM of 28,72,54,91

2 28, 72, 54, 91
2 14, 36, 27, 91
3 7, 18, 27, 91
3 7, 6, 9, 91
7 7, 2, 3, 91
1, 2, 3, 13

∴ So the LCM of the given numbers is 2 x 2 x 3 x 3 x 7 x 1 x 2 x 3 x 13 = 19656

Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 1/19656

Therefore, the GCF of Fractions 90/28,52/72,49/54,21/91 is 1/19656

Least Common Multiple of 28,72,54,91 with GCF Formula

Least Common Multiple of 28,72,54,91 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 28,72,54,91 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(28,72,54,91) = 1

common factors(in case of two or more numbers have common factors) = 504

GCF(28,72,54,91) x common factors =1 x 504 = 504

LCM(28,72,54,91) = ( 28 × 72 × 54 × 91 ) / 504

LCM(28,72,54,91) = 9906624 / 504

LCM(28,72,54,91) = 19656


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 90/28, 52/72, 49/54, 21/91

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 90/28, 52/72, 49/54, 21/91?

Answer: GCF of Numerators as per given numbers 90/28, 52/72, 49/54, 21/91 is

GCF of Numerators i.e. for 90,52,49,21 is 1

LCM of denominators i.e. for 28,72,54,91 is 19656.

Thus, GCF of Fractions is 1/19656.Finally, GCF of Fractions for 90/28, 52/72, 49/54, 21/91 is 1/19656.