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Anonymous
It is 54 plus 27 = 81
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54
2/3 is the simplest form of 54/81.
The GCF is 9.
LCM(18, 54, 81) = 162
gcf(54, 75, 81) = 3 54 = 2 x 3^3 75 = 3 x 5^2 81 = 3^4 gcf = 3