2/3
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The factor trees find the prime factorizations. The prime factorizations find the GCF. The GCF simplifies the fraction. 150 75,2 25,3,2 5,5,3,2 225 75,3 25,3,3 5,5,3,3 The GCF is 75 150/225 = 2/3
22.5 * (10/10) = 225/10 If you want to simplify: 225/10 = 45/2
It is: (225+150)/2 = 187.5
The GCF is 25.
The GCF is 25.