To find the ratios that are equivalent to \( \frac{3}{9} \), we can simplify \( \frac{3}{9} \) first:
\[ \frac{3}{9} = \frac{3 \div 3}{9 \div 3} = \frac{1}{3} \]
Now, we'll check the other options to see which are equivalent to \( \frac{1}{3} \) (and thus also to \( \frac{3}{9} \)).
- \( \frac{1}{3} \) → This is equivalent to \( \frac{3}{9} \).
- \( \frac{6}{9} \) → Simplifying \( \frac{6}{9} \): \[ \frac{6}{9} = \frac{6 \div 3}{9 \div 3} = \frac{2}{3} \quad (\text{not equivalent}) \]
- \( \frac{1}{9} \) → This is clearly not equivalent to \( \frac{3}{9} \).
- \( \frac{6}{18} \) → Simplifying \( \frac{6}{18} \): \[ \frac{6}{18} = \frac{6 \div 6}{18 \div 6} = \frac{1}{3} \quad (\text{equivalent}) \]
Therefore, the two ratios equivalent to \( \frac{3}{9} \) are:
- \( \frac{1}{3} \)
- \( \frac{6}{18} \)