SOLUTION: a 300-milliliter solution consists of 50% water.how many milliiters of water should be added to make solution 90% water

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Question 753448: a 300-milliliter solution consists of 50% water.how many milliiters of water should be added to make solution 90% water
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
I edited your question for spelling and identity of units of volume.

let v = volume of water to add.

highlight%28%28300%2A50%2Bv%2A100%29%2F%28300%2Bv%29=90%29
15000%2B100v=90%28v%2B300%29
15000%2B100v=90v%2B27000
10v=27000-15000
v=2700-1500=1200
highlight%28v=1200%29 milliliters