Explanation:
We need to find the unit rate of water to vinegar:
Unit rate =
Unit rate is determined in the form of fraction. The solute should be taken as a numerator and the amount of solvent should be taken as a solvent. Dividing the solute by the solvent as given in the question, reducing the denominator. It describes the how many units of the first type of quantity corresponds to second one unit of the second type of quantity.