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To calculate the GCF you first need to split the numbers into their prime factors: 16=2x2x2x2 32=2x2x2x2x2 The next step is to identify the common factors in each. Both numbers use four 2s, so we take these 4 2s and work out the product: 2x2x2x2=16 Thus, the GCF of 16 and 32 is 16.
8/32 + 16/32 = 24/32 or 3/4 Expressed as a decimal fraction, this is equal to 0.75.
The GCF is 8.
32/24 = 16/12 = 8/6 = 4/3 or 1.333 (repeating)
The GCF is 3.