A tank contains 9,000 gallons of a solution that is 6 percent sodium chloride by volume. If 3,000 gallons of water evaporate from the tank, the remaining solution will be approximately what percent sodium chloride?	Choose the correct choice from the following choices:
A) 6%
B) 7%
C) 8%
D) 9%
E) 10%
We start with 9,000 gallons of a solution that is 6% sodium chloride by volume. This means that there are 0.06 x 9,000 = 54 gallons of sodium chloride.   When 3,000 gallons of water evaporate we are left with 6,000 gallons of solution. From here we can determine what percent of the 6,000 gallon solution is sodium chloride.   (sodium chloride/total solution) x 100 = ?   (540/6,000) x 100 = ?   9/100 x 100 = ?   = 9%   Answer is 9%.
<result>D</result>
A tank contains 9,000 gallons of a solution that is 6 percent sodium chloride by volume. If 3,000 gallons of water evaporate from the tank, the remaining solution will be approximately what percent sodium chloride?