GCF of 66/28, 90/991, 639/605
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Use our free GCF of Fractions Calculator tool to compute the GCF of 66/28, 90/991, 639/605 i.e 3/16787540 easily. The following is the detailed procedure to determine the greatest common factor of fractions 66/28, 90/991, 639/605.
Enter two or more fractions separated by "commas"
Ex: 2/3, 5/7 or 3/5, 5/9, 7/3
What is the GCF of 66/28,90/991,639/605?
Given fractions are 66/28,90/991,639/605
To find the GCF of fractions, we have to find the GCF of numerator numbers and LCM of denominator numbers. Its formula is given by
GCF of Fraction = Greatest Common Factor of Numerator/Least Common Multiple of Denominators
In the fractions 66/28,90/991,639/605, numerators are 66,90,639
Denominators are 28,991,605
The GCF of 66,90,639 is 3 .
LCM of 28,991,605 is 16787540.
The greatest common factor of 66/28,90/991,639/605 = [GCF of 66,90,639]/[LCM of 28,991,605]= 3/16787540
Therefore, the GCF of 66/28,90/991,639/605 is 3/16787540.
To find the highest common factor of 66,90,639, we have to find the factors of both numbers and list the highest common factor.
The factors of 66 are 1, 2, 3, 6, 11, 22, 33, 66
The factors of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
The factors of 639 are 1, 3, 9, 71, 213, 639
The HCF of 66,90,639 is 3.
Lets's calculate GCF of 66,90,639
| 3 | 66, 90, 639 |
| 22, 30, 213 |
∴ So the GCF of the given numbers is 3 = 3
Greatest Common Factor of 66,90,639 By Matching Biggest Common Factor Method
Now, list down the factors of 66
:1,2,3,6,11,22,33,66
Now, list down the factors of 90
:1,2,3,5,6,9,10,15,18,30,45,90
Now, list down the factors of 639
:1,3,9,71,213,639
Greatest Common Factor
We found the factors 66,90,639 . The biggest common factor number is the GCF number.
So the greatest common factor 66,90,639 is 3.
Lets's calculate LCM of 28,991,605
Given numbers has no common factors except 1. So, there LCM is their product i.e 16787540
Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 3/16787540
Therefore, the GCF of Fractions 66/28,90/991,639/605 is 3/16787540
Least Common Multiple of 28,991,605 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 28,991,605 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(28,991,605) = 1
common factors(in case of two or more numbers have common factors) = 1
GCF(28,991,605) x common factors =1 x 1 = 1
LCM(28,991,605) = ( 28 × 991 × 605 ) / 1
LCM(28,991,605) = 16787540 / 1
LCM(28,991,605) = 16787540
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FAQs on GCF of Fractions of 66/28, 90/991, 639/605
1. What is the HCF of 66,90,639?
The HCF of 66,90,639 is 3
2. What is the GCF of a fraction?
The GCF of a fraction is defined as the greatest fraction that divides exactly into 2 or more fractions.
3. 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.
4. What is the GCF of Fractions for 66/28, 90/991, 639/605?
Answer: GCF of Numerators as per given numbers 66/28, 90/991, 639/605 is
GCF of Numerators i.e. for 66,90,639 is 3
LCM of denominators i.e. for 28,991,605 is 16787540.
Thus, GCF of Fractions is 3/16787540.Finally, GCF of Fractions for 66/28, 90/991, 639/605 is 3/16787540.