A solution is obtained by mixing 300 g of `25%` and 400 g of `40%` solution by mass. Calculate the mass percentage of the resultng solution.?

Explanation

To calculate the mass percentage of the resulting solution after mixing 300 g of a 25% solution and 400 g of a 40% solution, follow these steps:

### Step 1: Calculate the mass of solute in each solution.

1. **For the 25% solution:**
- Mass of the solution = 300 g
- Mass percentage = 25%
- Mass of solute = (Mass percentage / 100) × Mass of solution
...