100 g of solution contains 4 g of salt. How many grams of salt are in 250 g of this solution?

1) Find out how much salt is contained in 1 g of the solution: 4/100 = 0.04 g of salt

2) And now we can find out how much salt is in a 250g solution:

250 * 0.04 = 10 g salt

Answer: 10g salt in 250g solution

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