Greatest Common Factor and Simplify Fractions

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Use prime factorization: Find the GCF of 18 and 42.

GCF(18,42)=6

Use prime factorization: Find the GCF of 8 and 14.

GCF(8,14)=2

Use prime factorization: Find the GCF of 6 and 15.

GCF(6,15)=3

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