A set of even numbers cannot be relatively prime. They are all divisible by 2.
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The GCF is 6.
2 x 2 x 2 x 3 x 7 = 168 2 x 2 x 3 x 3 x 5 = 180 2 x 3 x 3 x 5 x 5 = 450
2 x 2 x 2 x 3 x 7 = 168 2 x 2 x 3 x 3 x 5 = 180 2 x 3 x 3 x 5 x 5 = 450 2 x 3 = 6, the GCF
450 * 0.4 = 180 450 - 180 = 270 So, the 40% off of $450 is $270
40% of 450 = 18040% of 450= 40% * 450= 0.40 * 450= 180