SOLUTION: I have a recipe that calls for 20 ML of 99% alcohol. I can only find 70% alcohol. How many ML's 70% Alcohol is equal to 20ML of 90% Alcohol?

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Question 352123: I have a recipe that calls for 20 ML of 99% alcohol. I can only find 70% alcohol. How many ML's 70% Alcohol is equal to 20ML of 90% Alcohol?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Do you mean 20ml of 99% alcohol or 20ml of 90% alcohol??
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20ml 99%=20%2899%2F100%29=19.8ml of alcohol
20ml 90%=20%2890%2F100%29=18ml of alcohol
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X ml 70%=70X%2F100
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70X%2F100=19.8
highlight%28X=28.3%29ml of 70% solution if using 99% solution value.
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70X%2F100=18
highlight_green%28X=25.7%29 ml of 70% solution if using 90% solution value.