42 - 80% = 42 x (1 - (80/100)) = 42 x 0.2 = 8.4
If the number refers to a unit of currency, don't forget to round to the appropriate number of decimal places and include the appropriate currency unit.
$2,520
1800 70% = .7 .7 * 6000 = 4200 6000 - 4200 = 1800
10 percent off 80 = 7210% off of 80= 80 - (10% * 80)= 80 - (0.10 * 80)= 80 - 8= 72
80 percent off of 700 is 560.
4200*0.40=1680 4200-1680=2520
$2,520
9 percent of 4200 is 378
1800 70% = .7 .7 * 6000 = 4200 6000 - 4200 = 1800
10 percent off 80 = 7210% off of 80= 80 - (10% * 80)= 80 - (0.10 * 80)= 80 - 8= 72
80 percent off of 700 is 560.
5% of 4200= 5% * 4200= 0.05 * 4200= 210
4200*0.40=1680 4200-1680=2520
16.75% of 4,200= 16.75% * 4200= 0.1675 * 4200= 703.5
15% of 4200 = 630
80 percent off 30.00 is 6.00.
Subtracting 80 percent off 130 gives 130 x (1 - (80/100)) = 26.
"20 percent off" means 80 percent still on.80 percent = 0.80.8 x 14.99 = 11.992