Perform the indicated operations and express your answer in the simplest form: 1. 2/9 3/9 = 2. 7/9 - 1/9 = 3. 5/11 4/11 = 4. 16/25 - 6/12 = 5. 7/20 3/8 = 6. 4/9 - 1/4 = 7. 2/5 7/10 = 8. 2 5/12 - 1/3 = 9. 8 1/4 2/7 = 10. 9 5/7 - 3 2/7 =