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Anonymous
80 percent of 81 = 64.8
80% of 81
= 80% * 81
= 80%/100% * 81
= 648/10 or 64.8
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78 + 79 + 80 + 80 + 81 + 81 = 479
Assuming you mean the arithmetic mean, it is 80.
135 percent of 81 = 109.35135% of 81= 135% * 81= 1.35 * 81= 109.35
81 percent = 0.81 or 81/100
81 percent .27 x 300 = .81 or 81%