Enter two or more fractions separated by "commas"
Ex: 2/3, 5/7 or 3/5, 5/9, 7/3
Given fractions are 21/34,34/17,38/68,90/29
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 21,34,38,90
Greatest Common Factor of Numerators i.e. GCF of 21,34,38,90 is 1 .
LCM of Denominators means LCM of 34,17,68,29 as per the given fractions.
LCM of 34,17,68,29 is 1972 as it is the smallest common factor for both these numbers.
Lets's calculate GCF of 21,34,38,90
∴ So GCF of numbers is 1 because of no common factors present between them.
Factors of 21
List of positive integer factors of 21 that divides 21 without a remainder.
1,3,7,21
Factors of 34
List of positive integer factors of 34 that divides 34 without a remainder.
1,2,17,34
Factors of 38
List of positive integer factors of 38 that divides 38 without a remainder.
1,2,19,38
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
Greatest Common Factor
We found the factors 21,34,38,90 . The biggest common factor number is the GCF number.
So the greatest common factor 21,34,38,90 is 1.
Lets's calculate LCM of 34,17,68,29
2 | 34, 17, 68, 29 |
17 | 17, 17, 34, 29 |
1, 1, 2, 29 |
∴ So the LCM of the given numbers is 2 x 17 x 1 x 1 x 2 x 29 = 1972
Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 1/1972
Therefore, the GCF of Fractions 21/34,34/17,38/68,90/29 is 1/1972
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 34,17,68,29 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(34,17,68,29) = 1
common factors(in case of two or more numbers have common factors) = 578
GCF(34,17,68,29) x common factors =1 x 578 = 578
LCM(34,17,68,29) = ( 34 × 17 × 68 × 29 ) / 578
LCM(34,17,68,29) = 1139816 / 578
LCM(34,17,68,29) = 1972
Here are some samples of GCF of Fractions calculations.
Here are some samples of GCF of Fractions calculations.
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 21/34, 34/17, 38/68, 90/29?
Answer: GCF of Numerators as per given numbers 21/34, 34/17, 38/68, 90/29 is
GCF of Numerators i.e. for 21,34,38,90 is 1
LCM of denominators i.e. for 34,17,68,29 is 1972.
Thus, GCF of Fractions is 1/1972.Finally, GCF of Fractions for 21/34, 34/17, 38/68, 90/29 is 1/1972.