GCF of 7/90, 762/78, 420/15
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Use our free GCF of Fractions Calculator tool to compute the GCF of 7/90, 762/78, 420/15 i.e 1/1170 easily. The following is the detailed procedure to determine the greatest common factor of fractions 7/90, 762/78, 420/15.
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 7/90,762/78,420/15?
Given fractions are 7/90,762/78,420/15
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 7/90,762/78,420/15, numerators are 7,762,420
Denominators are 90,78,15
The GCF of 7,762,420 is 1 .
LCM of 90,78,15 is 1170.
The greatest common factor of 7/90,762/78,420/15 = [GCF of 7,762,420]/[LCM of 90,78,15]= 1/1170
Therefore, the GCF of 7/90,762/78,420/15 is 1/1170.
To find the highest common factor of 7,762,420, we have to find the factors of both numbers and list the highest common factor.
The factors of 7 are 1, 7
The factors of 762 are 1, 2, 3, 6, 127, 254, 381, 762
The factors of 420 are 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
The HCF of 7,762,420 is 1.
Lets's calculate GCF of 7,762,420
∴ So GCF of numbers is 1 because of no common factors present between them.
Greatest Common Factor of 7,762,420 By Matching Biggest Common Factor Method
Now, list down the factors of 7
:1,7
Now, list down the factors of 762
:1,2,3,6,127,254,381,762
Now, list down the factors of 420
:1,2,3,4,5,6,7,10,12,14,15,20,21,28,30,35,42,60,70,84,105,140,210,420
Greatest Common Factor
We found the factors 7,762,420 . The biggest common factor number is the GCF number.
So the greatest common factor 7,762,420 is 1.
Lets's calculate LCM of 90,78,15
| 2 | 90, 78, 15 |
| 3 | 45, 39, 15 |
| 5 | 5, 13, 15 |
| 1, 13, 3 |
∴ So the LCM of the given numbers is 2 x 3 x 5 x 1 x 13 x 3 = 1170
Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 1/1170
Therefore, the GCF of Fractions 7/90,762/78,420/15 is 1/1170
Least Common Multiple of 90,78,15 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 90,78,15 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(90,78,15) = 3
common factors(in case of two or more numbers have common factors) = 30
GCF(90,78,15) x common factors =3 x 30 = 90
LCM(90,78,15) = ( 90 × 78 × 15 ) / 90
LCM(90,78,15) = 105300 / 90
LCM(90,78,15) = 1170
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FAQs on GCF of Fractions of 7/90, 762/78, 420/15
1. What is the HCF of 7,762,420?
The HCF of 7,762,420 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 7/90, 762/78, 420/15?
Answer: GCF of Numerators as per given numbers 7/90, 762/78, 420/15 is
GCF of Numerators i.e. for 7,762,420 is 1
LCM of denominators i.e. for 90,78,15 is 1170.
Thus, GCF of Fractions is 1/1170.Finally, GCF of Fractions for 7/90, 762/78, 420/15 is 1/1170.