To find 10 percent of a number, multiply that number by 0.1. In this instance, 200 x 0.1 = 20. Therefore, 10 percent of 200 is equal to 20.
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ten percent of 200 is 20. You multiply 200 * .10
Ten percent 20/200 = 10/100 = 10%
to get answer you divide percent by 100 and multiply: 200 percent of 200 = 2 x 200 = 400
Divide by ten. e.g. 200 mg/L = 20%
200 percent = 2.0