\[\frac{4}{1000}\]

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Examples

Find the Greatest Common Factor (GCF) of

4,1000

Method 1: By Listing Factors

List the factors of each number.

Factors of 4

: 1, 2, 4

Factors of 1000

: 1, 2, 4 ... 250, 500, 1000

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 1000

: 2, 2, 2, 5, 5, 5

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}{1000\div 4}

Simplify.

\frac{1}{250}

Done

Decimal Form: 0.004

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