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Daily Math Challenge

📚 Science ⭐ Hard 🎓 Grade 6-8
A DNA strand is 30% adenine. What percentage is guanine? (In DNA: A=T and G=C)
Answer
20 percent

📝 Step-by-Step Solution

1
Adenine: 30%, so Thymine: 30%
2
Remaining: 100% - 60% = 40%
3
Guanine = Cytosine: 40% ÷ 2 = 20%
💡 Helpful Hints
• A pairs with T (equal amounts)
• G pairs with C (equal amounts)
• All four must add to 100%