This is similar to Problem 5 from your Section 2.3 (part 2) worksheet.

How many milliliters of water must be mixed with $47$ milliliters of a $56$% sulfuric acid solution to obtain a $55$% sulfuric acid solution? You can think of water as a $0$% sulfuric acid solution.

You must add milliliters of water.

Hint:

Hint: