To get a 15% solution, you need to take 15 grams of sugar per 100 grams of water. Let us determine how many times 300 grams of sugar is more than 15 grams, and by increasing 100 grams of water by the same amount, we will get the answer to the problem:
300/15 = 20 times.
100 * 20 = 2000 grams = 2 liters.
Answer: Add 2 liters of water to 300 grams of sugar.
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