Question 1008889: A chemist is using
384
milliliters of a solution of acid and water. If
13.9%
of the solution is acid, how many milliliters of acid are there? Round your answer to the nearest tenth.
Answer by Miniml1(17)   (Show Source):
You can put this solution on YOUR website! To find the percentage of any number, move the decimal place of the percentage twice to the left and negate the percentage symbol. 13.9% would change to .139. Then multiply your number by the percentage that you manipulated. If you wanted to find the amount of the remaining solution, subtract the percentage you have already dealt with from 100% or 1.00. The remaining solution is 86.1% or .861. Never change the number in the problem, only the percentages. The question states that everything is in mm and 13.9% or .139 is the amount of acid. The tenths place of any decimal is the first placeholder.
384 times .139 = 53.376, then round .376 up to make the answer 53.4
384 times .861 = 330.624 then round .624 down to make the answer 330.6
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