\[\frac{4}{12}\]

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Examples

Find the Greatest Common Factor (GCF) of

4,12

Method 1: By Listing Factors

List the factors of each number.

Factors of 4

: 1, 2, 4

Factors of 12

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

Find the largest number that is shared by all rows above. This is the GCF.

GCF =

4

Method 2: By Prime Factors

List the prime factors of each number.

Prime Factors of 4

: 2, 2

Prime Factors of 12

: 2, 2, 3

Find the intersection of these primes.

2,2

Multiply these numbers:

2\times 2=4

. This is the GCF.

GCF =

4

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4

Divide both the numerator and the denominator by the GCF.

\frac{4\div 4}{12\div 4}

Simplify.

\frac{1}{3}

Done

Decimal Form: 0.333333

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