Greatest Common Factor of 21/66, 170/13, 442/680

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

GCF of 21/66, 170/13, 442/680

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 21/66,170/13,442/680

Given fractions are 21/66,170/13,442/680

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 21,170,442

Greatest Common Factor of Numerators i.e. GCF of 21,170,442 is 1 .

LCM of Denominators means LCM of 66,13,680 as per the given fractions.

LCM of 66,13,680 is 291720 as it is the smallest common factor for both these numbers.

Lets's calculate GCF of 21,170,442

GCF of Fractions 21/66,170/13,442/680 is 1/291720

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

Greatest Common Factor of 21,170,442 By Matching Biggest Common Factor Method

Greatest Common Factor of 21,170,442 By Matching Biggest Common Factor Method

Factors of 21

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

1,3,7,21

Factors of 170

List of positive integer factors of 170 that divides 170 without a remainder.

1,2,5,10,17,34,85,170

Factors of 442

List of positive integer factors of 442 that divides 442 without a remainder.

1,2,13,17,26,34,221,442

Greatest Common Factor

We found the factors 21,170,442 . The biggest common factor number is the GCF number.
So the greatest common factor 21,170,442 is 1.

Lets's calculate LCM of 66,13,680

2 66, 13, 680
33, 13, 340

∴ So the LCM of the given numbers is 2 x 33 x 13 x 340 = 291720

Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 1/291720

Therefore, the GCF of Fractions 21/66,170/13,442/680 is 1/291720

Least Common Multiple of 66,13,680 with GCF Formula

Least Common Multiple of 66,13,680 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 66,13,680 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(66,13,680) = 1

common factors(in case of two or more numbers have common factors) = 2

GCF(66,13,680) x common factors =1 x 2 = 2

LCM(66,13,680) = ( 66 × 13 × 680 ) / 2

LCM(66,13,680) = 583440 / 2

LCM(66,13,680) = 291720


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 21/66, 170/13, 442/680

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 21/66, 170/13, 442/680?

Answer: GCF of Numerators as per given numbers 21/66, 170/13, 442/680 is

GCF of Numerators i.e. for 21,170,442 is 1

LCM of denominators i.e. for 66,13,680 is 291720.

Thus, GCF of Fractions is 1/291720.Finally, GCF of Fractions for 21/66, 170/13, 442/680 is 1/291720.