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To get the Greates Common Factor (GCF) of 99 and 708 we need to factor each value first and then we choose all the copies of factors and multiply them:
|99: || || ||3||3||11|| |
|708: ||2||2||3|| || ||59|
|GCF: || || ||3|| || || |
The Greates Common Factor (GCF) is: 3