SOLUTION: I have 500g solution that is 40% acid, how many water should I add to make it 25% acid?

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Question 469812: I have 500g solution that is 40% acid, how many water should I add to make it 25% acid?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
I have 500g solution that is 40% acid, how many water should I add to make it 25% acid?
...
let x= grams of water to add
40%*500=25%*(500+x)
200=125+.25x
75=.25x
x=300 g.