(13/109)*100 = 11.93$
40 percent off of 109 dollars is 43.6 dollars.
It is 98.10 dollars.
$92.65
The math is (109/100)*20 = $21.8
109 - 60% = 109 x (1 - (60/100)) = 109 x 0.4 = $43.60
13 dollars - 20 percent plus 8 percent = 11.232
75% off means 25% remaining. 25% of $109 is $27.75 .
$21.8 109x.2=21.8
1.3 dollars
13*20/100 = 2.60 dollars.
20 percent of 65 dollars is 13 dollars.
Ten percent of 130 thousand dollars is 13 thousand dollars.