It is: 27.8% rounded to 1 decimal place
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5% of 18= 5% * 18= 0.05 * 18= 0.9
%*amount=answer .40*45=answer answer=18 boys
18
To find 5 percent of a number, multiply the number by 0.05. In this instance, 0.05 x 18 = 0.9 pounds.
18 students failed the class. 80 total students: A = 10% = 8 B = 23% = 18.4 [not possible, so let us say 18] - this would work with 25% C = 30% = 24 D = 15% = 12 80 - 8 - 18 - 24 - 12 = 18 NOTE: If 25% had a B, then only 16 students failed.