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To get the Greates Common Factor (GCF) of 480 and 117 we need to factor each value first and then we choose all the copies of factors and multiply them:
|480: ||2||2||2||2||2||3|| ||5|| |
|117: || || || || || ||3||3|| ||13|
|GCF: || || || || || ||3|| || || |
The Greates Common Factor (GCF) is: 3