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Daily Math Challenge

📚 Science ⭐ Hard 🎓 Grade 6-8
A solution contains 250 mL of water and 50 mL of salt. If you add 150 mL more water, what is the new concentration of salt as a percentage?
Answer
12.5 percent

📝 Step-by-Step Solution

1
Initial: 250 mL water + 50 mL salt = 300 mL total
2
After adding water: 400 mL total (salt stays 50 mL)
3
Concentration: (50 ÷ 400) × 100 = 12.5%
💡 Helpful Hints
• Find new total volume
• Salt amount stays the same
• Divide salt by new total