SOLUTION: In a 200 gallon tank, a farmer has 120 gallons of an insecticide and water solution that is 4% insecticide and 96% water. If he adds 30 gallons of pure water to this tank, what is

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: In a 200 gallon tank, a farmer has 120 gallons of an insecticide and water solution that is 4% insecticide and 96% water. If he adds 30 gallons of pure water to this tank, what is       Log On


   

Question 847819: In a 200 gallon tank, a farmer has 120 gallons of an insecticide and water solution that is 4% insecticide and 96% water. If he adds 30 gallons of pure water to this tank, what is the percentage of the new solution that is insecticide? What is the percentage of the new solution that is water?
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
The farmer is adding water, diluting the insecticide, but this does not change the amount of insecticide; the water is 0% insecticide.

highlight_green%28120%2A4%2F%28120%2B30%29=P%29, and P is the percent insecticide in this new solution.

Then, highlight_green%28100-P%29 is the percent water in this new solution.