Step by step
- Write each number as a fraction3 = 3/1
- Keep, change, flipKeep the first fraction, change ÷ to ×, and flip the second fraction upside down:3/1 ÷ 1/3 = 3/1 × 3/1
- Multiply the tops, then the bottoms(3 × 3)/(1 × 1) = 9/1
Check: 9 × 1/3 = 3 ✓