16 cause the highest factor for both 128 and 640
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128
128 is what percent of 640:= 128 / 640= 0.2Converting decimal to a percentage:0.2 * 100 = 20%
The GCF is 128.
128 / 640 = 0.2Converting decimal to a percentage: 0.2 * 100 = 20%
The GCF is: 4.