180 g of water was added to 620 g of the 40℅ salt solution. Find the percentage of salt in the new solution.

Find the amount of salt dissolved in water:

620 * 40/100 = 62 * 4 = 248 g of salt;

Find the total weight of the new solution:

620 + 180 = 800 g solution;

Let’s calculate the percentage of salt in the new solution:

248: 800 = 0.31 = 31%.

Answer: the new solution contains 31% salt.

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