47/100 times 109/1 equals 5123/100 equals 51.23 then you just subtract 109 minus 51.23
So the answer is 57.77.
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Subtracting 109 percent from 115 gives 115 x (1 - 109/100) = 115 x (-0.09) = -10.35.
$92.65
47% off 30 pounds = 15.90
109 - 60% = 109 x (1 - (60/100)) = 109 x 0.4 = $43.60
30% off of 47 = 70% [100%-30%] left of 47 = 47*70/100 = 32.9