1
0.25% of 400
= 0.25% * 400
= 0.0025 * 400
= 1
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.025 percent Solution Method: 250 ppm = the ratio 250:1,000,000 = the fraction 250/1,000,000 = the decimal value 0.00025 = the percentage .025 (i.e. 0.00025 * 100)
9 percent of 400 is 36.
To find 40 percent of 400, you can convert the percentage to a decimal by dividing it by 100, giving you 0.40. Then, you multiply 0.40 by 400 to get the answer. So, 40 percent of 400 is 160.
.025 Keep in mind one percent = .01, that makes it easier to solve questions involving %'s!