Question 1046181
0.55 = 0.4v

0.55 / 0.4 = 0.4v / 0.4

1.375 = v

Where am I correct ?

Also, I have read that if, an amount of water, in this case, the amt. of alcohol is diluted, but when alcohol is added, the amt. remains unchanged.  Am I on the right track ?
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A 1 qt. mixture of alcohol and water is 95% alcohol. The mixture is to be reduced to 40% alcohol. Determine amount of distilled water to be added. 
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Add W quarts of water
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1*95 + W*0 = (1 + W)* 40
40W + 40 = 95
40W = 55
W = 11/8 quarts