306. A thank you or brainliest is always appreciated!
Answer:

Step-by-step explanation:
This question implies the constant rate or proportion of water to mass. Therefore, we can set up the following equation:

Answer:
About 15%
Step-by-step explanation:
3 divided by 19 is 0.1578947368421053
0.1578947368421053 multiplied by 100 is 15.78947368421053.