1. Understand the Conversion:

* There are 2 cups in every pint.

2. Convert Pints to Cups:

* 3 pints * 2 cups/pint = 6 cups

3. Find the Ratio:

* The ratio of 6 cups to 7 cups is 6:7.

Therefore, the ratio of 3 pints of water to 7 cups of water is 6:7.