GCF (HCF) of 108 and 120

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What is the Greatest Common Divisor of 108 and 120?

Answer

GCF (HCF) of 108 and 120 is
12

Common factors: 1, 2, 3, 4, 6, 12

12 divides both: 108 ÷ 12 = 9, 120 ÷ 12 = 10 — and 9 and 10 share no factor but 1, so no larger number divides both.

108 = 22 × 33

120 = 23 × 3 × 5

Prime108120Lowest power
2222322
33333
5—5—

— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.

GCF = 22 × 3 = 12

See Also

GCF Table

Number 1Number 2GCF
1081053
1081062
1081071
108108108
1081091
1081102
1081113
1081124
1081131
1081146
1081151
1081164
1081179
1081182
1081191
10812012
1081211
1081222
1081233
1081244
1081251
10812618
1081271
1081284
1081293
1081302
1081311
10813212
1081331
1081342

FAQ

What is the Greatest Common Divisor of 108 and 120?

GCF (HCF) of 108 and 120 is 12

How to find the GCF of 108 and 120?

You can find the GCF of 108 and 120 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 108 and 120 is 12.

What prime factors do 108 and 120 share?

The prime factorizations of 108 and 120 have 2 × 2 × 3 in common, and multiplying those shared primes gives 12 — exactly the greatest common factor.

How does the GCF reduce the fraction 108/120?

Divide the numerator and the denominator by the GCF 12: 108 ÷ 12 = 9 and 120 ÷ 12 = 10. So 108/120 in lowest terms is 9/10.