How many grams of potassium phosphorus and water do you need to take to prepare 60 g of a 25% salt solution?

In order to solve this problem, we calculate in the following way and use the following formulas for solving:
We know the following formula for calculating the mass fraction, which looks like this:
W = m (v.va) × 100% / m (p.pa)
From this formula, we express the mass of the substance and get the following:
m (v. wa) = W × m (p.pa) / 100%
Next, Substitute the values ​​into the formula and calculate the mass of salt:
m (K3PO4) = 25 × 60/100 = 15 g
further, to find out the mass of water for this, we subtract the mass of the salt obtained from the total mass and get the following solution:
m (H2O) = 60 – 15 = 45 g
Answer: 15 g of salt and 45 g of water.