To find 2.5 percent of 800, you can multiply 800 by 0.025 (which is 2.5 percent as a decimal). This calculation results in 20, meaning that 2.5 percent of 800 is 20.
800 - (20%) = 640
800% of 4,000 = 800% * 4000 = 8 * 4000 = 32,000
20% of $800 = 20% * 800 = 0.2 * 800 = $160
$800 is 20 percent of $4000.
20
Deducting 20% off 800 would be 800-160 which is 640
800 less 80% of it is 100% - 80% = 20% left. 20% of 800 is 20/100 x 800 = 160.
800
160
18.5
800