GCF of 85/20, 81/13, 74/48, 86/80
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Use our free GCF of Fractions Calculator tool to compute the GCF of 85/20, 81/13, 74/48, 86/80 i.e 1/3120 easily. The following is the detailed procedure to determine the greatest common factor of fractions 85/20, 81/13, 74/48, 86/80.
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 85/20,81/13,74/48,86/80?
Given fractions are 85/20,81/13,74/48,86/80
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 85/20,81/13,74/48,86/80, numerators are 85,81,74,86
Denominators are 20,13,48,80
The GCF of 85,81,74,86 is 1 .
LCM of 20,13,48,80 is 3120.
The greatest common factor of 85/20,81/13,74/48,86/80 = [GCF of 85,81,74,86]/[LCM of 20,13,48,80]= 1/3120
Therefore, the GCF of 85/20,81/13,74/48,86/80 is 1/3120.
To find the highest common factor of 85,81,74,86, we have to find the factors of both numbers and list the highest common factor.
The factors of 85 are 1, 5, 17, 85
The factors of 81 are 1, 3, 9, 27, 81
The factors of 74 are 1, 2, 37, 74
The factors of 86 are 1, 2, 43, 86
The HCF of 85,81,74,86 is 1.
Lets's calculate GCF of 85,81,74,86
∴ So GCF of numbers is 1 because of no common factors present between them.
Greatest Common Factor of 85,81,74,86 By Matching Biggest Common Factor Method
Now, list down the factors of 85
:1,5,17,85
Now, list down the factors of 81
:1,3,9,27,81
Now, list down the factors of 74
:1,2,37,74
Now, list down the factors of 86
:1,2,43,86
Greatest Common Factor
We found the factors 85,81,74,86 . The biggest common factor number is the GCF number.
So the greatest common factor 85,81,74,86 is 1.
Lets's calculate LCM of 20,13,48,80
| 2 | 20, 13, 48, 80 |
| 2 | 10, 13, 24, 40 |
| 2 | 5, 13, 12, 20 |
| 2 | 5, 13, 6, 10 |
| 5 | 5, 13, 3, 5 |
| 1, 13, 3, 1 |
∴ So the LCM of the given numbers is 2 x 2 x 2 x 2 x 5 x 1 x 13 x 3 x 1 = 3120
Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 1/3120
Therefore, the GCF of Fractions 85/20,81/13,74/48,86/80 is 1/3120
Least Common Multiple of 20,13,48,80 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 20,13,48,80 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(20,13,48,80) = 1
common factors(in case of two or more numbers have common factors) = 320
GCF(20,13,48,80) x common factors =1 x 320 = 320
LCM(20,13,48,80) = ( 20 × 13 × 48 × 80 ) / 320
LCM(20,13,48,80) = 998400 / 320
LCM(20,13,48,80) = 3120
GCF of Fractions Calculation Examples
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FAQs on GCF of Fractions of 85/20, 81/13, 74/48, 86/80
1. What is the HCF of 85,81,74,86?
The HCF of 85,81,74,86 is 1
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 85/20, 81/13, 74/48, 86/80?
Answer: GCF of Numerators as per given numbers 85/20, 81/13, 74/48, 86/80 is
GCF of Numerators i.e. for 85,81,74,86 is 1
LCM of denominators i.e. for 20,13,48,80 is 3120.
Thus, GCF of Fractions is 1/3120.Finally, GCF of Fractions for 85/20, 81/13, 74/48, 86/80 is 1/3120.