10% of 40 is 4, so 10% off would mean subtracting that from 40
40-4 = 36
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Subtracting 10 percent from 40 dollars gives 40 x (1 - (10/100)) = 36 dollars.
$36.00
6
$10 ($40).
10 percent of 442 dollars is $44.20, so 40% is $176.80 .