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1. 5/3 × 5/6 = 5 · 5 / 3 · 6 = 25/18

2. 6/11 × 22/23 = 6 · 22 / 11 · 23 = 12/23

3. 7/16 × 8/35 = 7 · 8 / 16 · 35 = 1/10.

4. 5 2/3 × 2 5/6 = 17/3 × 17/6 = 289/18

5. 15 3/4 × 7 5/9 = 63/4 × 68/9 = 7 × 17 = 119.

6. (5 2/3 × 2 5/6) × (5 2/3 × 1/6) = 4913/324

1) 5 2/3 × 2 5/6 = 17/3 × 17/6 = 289/18

2) 5 2/3 × 1/6 = 17/3 × 1/6 = 17/18

3) 289/18 × 17/18 = 4913/324