When you need to find a percent, just multiply your base number (in this case 400) by the percent divided by 100 (so 5/100 = .05). So, 400 x .05 = 20.
400
67.5 percent of 400 is 270.
9 percent of 400 is 36.
69 percent of 400 is 276.
17.5 percent of 400 is 70
8.000 is two percent of 400.
0.6 percent of 400 is 2.4
20 percent of 400 is 80.
99 percent of 400 is 396.
400 percent of 1000 = 4000
0.05 percent = 5 hundredths percent